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{{Short description|Activist and hacker from Croatia (born 1983)}}
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{{Use mdy dates|date=June 2015}}
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{{Infobox person
{{Infobox person
| honorific_prefix =
| honorific_prefix =
| name = Denis Periša
| name = Denis Periša
| honorific_suffix =
| honorific_suffix =
| native_name =
| image = denis perisa.jpg
| native_name_lang =
| image_size =
| image = denis perisa.jpg
| alt =
| image_size =
| caption =
| alt =
| birth_name = Denis Periša
| caption =
| birth_date = {{Birth date and age|1983|07|23}}
| birth_place = [[Šibenik]], [[Socialist Republic of Croatia|SR Croatia]], [[Socialist Federal Republic of Yugoslavia|Yugoslavia]] {{small|(now [[Croatia]])}}
| birth_name = Denis Periša
| birth_date = {{Birth date and age|1983|07|23}}
| monuments =
| nationality = Croatian
| birth_place = [[Šibenik]], [[Socialist Republic of Croatia|SR Croatia]], [[Socialist Federal Republic of Yugoslavia|Yugoslavia]] {{small|(now [[Croatia]])}}
| monuments =
| other_names =
| residence =
| citizenship = Croatian
| nationality = Croatian
| education =
| other_names =
| occupation = [[Computer hacker]] and [[whistle blower]]
| years_active =
| ethnicity = <!-- Ethnicity should be supported with a citation from a reliable source -->
| citizenship = Croatian
| employer =
| education =
| organization =
| occupation = [[computer hacker]] • [[whistle blower]]
| agent =
| years_active =
| known_for = Hactivism
| employer =
| notable_works =
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| net_worth = <!-- Net worth should be supported with a citation from a reliable source -->
| known_for = Hactivism
| television =
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| term =
| influences =
| movement = Anonymous
| influenced =
| opponents =
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| criminal_charge = <!-- Criminality parameters should be supported with citations from reliable sources -->
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| criminal_penalty =
| weight = <!-- {{convert|weight in kg|kg|lb}} -->
| television =
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| movement = Anonymous
| children =
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| relatives = [[Tina Periša]] (sister)
| awards =
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| website = {{URL|www.denis.in}}
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'''Denis Periša''' (born July 23, 1983) is a political activist, [[whistle blower]] and [[computer hacker]] from [[Šibenik]], [[Croatia]]. He was [[convicted]] and [[criminally]] charged<ref>Večernji list, September 17, 1999 [http://www.denis.in/slike/mediji/vecernji_list_1_big.jpg "Sixteen years old hacker broke in personal computer and network of Veselin Pejnović (local)]"</ref><ref>Jutarnji list, September 18, 1999 [http://www.denis.in/slike/mediji/jutarnji_list_1_big.jpg "Hackers are thieves (local)]"</ref><ref>Slobodna Dalmacija, September 18, 1999 [http://www.denis.in/slike/mediji/slobodna_dalmacija_2_big.jpg "Break in program? of Veselin Pejnović was accidental (local)]"</ref><ref>Slobodna Dalmacija, September 19, 1999 [http://www.denis.in/slike/mediji/slobodna_dalmacija_1_big.jpg "Šibenik hacker gets criminally charged (local)]"</ref> in September 1999. He was forbidden to use any form of [[computer systems]] or internet for hacking the e-mail of politician Veselin Pejnović,<ref>[[List of members of Croatian Parliament, 1992–95]]</ref> while planting a backdoor to his network. He founded the [[computer security]] website Jezgra.org in 1997 that is still active today. He's also the Founder of ŠI-WIFI [[wireless]]. An organization that was formed for his town in late 2005.<ref>Slobodna Dalmacija, May 23, 2014 [http://www.slobodnadalmacija.hr/Dalmacija/Sibenik/tabid/74/articleType/ArticleView/articleId/245808/Default.aspx "Šibenik city core covered by WIFI (local)]"</ref><ref>Metro Express, March 15, 2007 (local) [http://www.denis.in/slike/mediji/metro_express_br_upitnik1_big.jpg "They use WIFI to wirelessly network whole town of Šibenik"]</ref> Denis also claims himself to be a DJ,<ref>Šibenski List, September 4, 2009 (local) [http://www.denis.in/slike/mediji/sibenski_list_br_borsa_big.jpg "...hacker and DJ in free time"]</ref> photographer<ref>Šibenski List, January 7, 2015 (local) [http://www.denis.in/slike/mediji/sibenski_list_atelje_07.01.2015.jpg "On my photos there are no unnecessary details"]</ref> and recently a writer of the book called "My first suicide", which has yet to be released.<ref>"My first suicide book by Denis" (local) [https://www.facebook.com/permalink.php?story_fbid=376365349196211&id=376353102530769&notif_t=like "My first suicide book by Denis"]</ref>
'''Denis Periša''' (born July 23, 1983) is a political activist, [[whistle blower]] and [[computer hacker]] from [[Šibenik]], [[Croatia]]. He was [[convicted]] and [[criminally]] charged in September 1999.<ref>Večernji list, September 17, 1999 [http://www.denis.in/slike/mediji/vecernji_list_1_big.jpg "Sixteen-year-old hacker broke in to personal computer and network of Veselin Pejnović"]</ref><ref>Jutarnji list, September 18, 1999 [http://www.denis.in/slike/mediji/jutarnji_list_1_big.jpg "Hackers are thieves"]</ref><ref>''Slobodna Dalmacija'', September 18, 1999 [http://www.denis.in/slike/mediji/slobodna_dalmacija_2_big.jpg "Break in program of Veselin Pejnović was accidental"]</ref><ref>''Slobodna Dalmacija'', September 19, 1999 [http://www.denis.in/slike/mediji/slobodna_dalmacija_1_big.jpg "Šibenik hacker gets criminally charged"]</ref> He was forbidden the use of any form of [[computer systems|computer system]] or the internet for hacking the e-mail of politician Veselin Pejnović while planting a backdoor to his network. He founded the [[computer security]] website Jezgra.org in 1997. In 2005, he founded ŠI-WIFI [[wireless]], an organization that was formed for his town.<ref>''Slobodna Dalmacija'', May 23, 2014 [http://www.slobodnadalmacija.hr/Dalmacija/Sibenik/tabid/74/articleType/ArticleView/articleId/245808/Default.aspx "Šibenik city core covered by WIFI"]</ref><ref>''Metro Express'', March 15, 2007 (local) [http://www.denis.in/slike/mediji/metro_express_br_upitnik1_big.jpg "They use WIFI to wirelessly network whole town of Šibenik"]</ref>

==Background==

===Childhood===

Periša was raised in [[Šibenik]], [[Croatia]], with his sister Tina.
Periša became interested in [[computers]] at an early age, programming in Basic by age thirteen, doing small [[games]] on [[Commodore 128]], and forming hacking groups at age fifteen in local computer club.{{citation needed|date=August 2017}}

===Medical condition===
In early [[childhood]] he had a [[medical condition]] with his [[right lung]].<ref>Medical discharge letter (lung surgery) [http://www.denis.in/slike/scan/sc3-low.jpg Medical discharge letter, November 1, 1984 (local)]</ref> After surgery he was unable to [[vaccinate]] against a common illness and shortly after he got [[Tetanus]] after a cat scratched him.<ref>Medical discharge letter (Tetanus 1) [http://www.denis.in/slike/scan/sc2-low.jpg Medical discharge letter (Tetanus 1), March 13, 1987 (local)]</ref><ref>Medical discharge letter (Tetanus 2) [http://www.denis.in/slike/scan/sc1-low.jpg Medical discharge letter (Tetanus 2), April 9, 1987 (local)]</ref> He was saved by a former [[military officer]] of [[Yugoslav army]] (JNA) who ordered a [[military helicopter]] for him to be sent from [[Šibenik]] to [[Zagreb]] for emergency and [[life saving]] [[medical care]]. After many years he fully recovered but the physical [[scars]] of surgery and [[Tracheotomy]] on his neck is left as a reminder of [[near death experience]]. He acquired very [[asocial behavior]] due to lack of [[socialization]].

===Education===

He often skipped school and didn't like to attend it. After he was [[arrested]] his mom was delighted that he shows interest in [[computer science]] and called the local [[firm]] "Ciam" which said "we cannot teach your son anything more, he could train our technicians".<ref>Mom and dad: "We don't know how to help our son" [http://www.denis.in/slike/mediji/jutarnji_list_1_big.jpg Jutarnji List, September 18, 1999 (local)]</ref> He went to numerous schools. He found photography to be most interesting skill he could learn but he dropped out after 2 years, never graduating high school.

===Music===

Denis has a lifelong interest in [[hip-hop music]], performing as a DJ in a band in 2006.<ref>"Over 20 songs ready for publish" [http://www.denis.in/slike/mediji/novi_tjednik_br7_2_big.jpg Novi Tjednik, June 5, 2006 (local)]</ref> Later he was a DJ<ref>"Headline of Vox weekly" [http://www.denis.in/slike/mediji/dark_VOX_INSIDE_HEADLINE.jpg Vox Weekly, November 09, 2009 (local)]</ref> in gigs at nearby towns and he is the [[co-founder]] of "Zadar Muzika" with many hosted events.<ref>"Hip-hop minifest Vol.2: Dancing battle on floor" [http://www.ezadar.hr/clanak/hip-hop-minifest-vol2-obracun-na-plesnom-podiju eZadar, December 13, 2008 (local)]</ref><ref>"Hip-hop minifest Vol.2: Dancing battle interrupted by police" [http://www.ezadar.hr/clanak/plesno-natjecanje-prekinula-policija eZadar, December 13, 2008 (local)]</ref> Denis also started making his own [[rap]] [[songs]] and doing [[hip-hop]] production with performers from former [[Yugoslavia]] countries.<ref>"Rap songs" [http://www.soundclick.com/darkman soundclick.com, July 23, 2003]</ref>


==Activism==
==Activism==


During the [[COVID-19 pandemic]], as part of a group, Periša made [[3D printing|3D-printed]] face shields for the local hospitals in [[Drniš]] and [[Knin]].<ref>"Denis plans to make face shields for the local hospital" [https://www.sibenik.in/sibenik/sibencanin-denis-perisa-planira-izraditi-zastitne-maske-pomocu-3d-printera-za-osoblje-sibenske-bolnice/120424.html sibenik.in, March 24, 2020]</ref><ref>"Drniš hospital gets 3D-Printed face-shields donation" [https://www.radiodrnis.hr/dom-zdravlja-drnis-dobio-novu-donaciju-zastitnih-3d-vizira/ Radio Drniš, April 8, 2020]</ref><ref>"First 3D-Printed faceshields went to Murter" [https://www.sibenik.in/sibenik/prve-3d-zastitne-maske-su-otisle-na-murter-nisam-spavao-printam-cijelu-noc/120485.html sibenik.in, March 26, 2020]</ref><ref>"Denis plays his part in coronavirus outbreak" [https://sibenskiportal.hr/aktualno/sibencanin-daje-svoj-doprinos-u-borbi-protiv-epidemije-denis-perisa-printa-3d-vizire-za-lijecnike/ sibenik.in, March 24, 2020]</ref><ref>"3D printers work day and night for hospitals" [https://sibenski.slobodnadalmacija.hr/sibenik/vijesti/sibenik/3d-printeri-i-u-sibeniku-rade-punom-parom-medicinski-viziri-iz-manufakture-u-narancastoj-zgradi-1011934 ''Slobodna Dalmacija'', March 26, 2020]</ref><ref>"Computer experts and designers in fight against coronavirus" [https://morski.hr/2020/03/25/hrvatski-informaticari-i-dizajneri-u-borbi-protiv-virusa-3d-printerima-izraduju-zastitnu-opremu-za-bolnice/ morski.hr, March, 2020]</ref>
===[[Coronavirus]] [[Outbreak]]===
In the course of 2020, Denis provided the [[local government]] with numerous [[logistical]] and advisory services in the management of the [[coronavirus]] crisis. Denis requested <ref>"Denis plans to make face shields for the local hospital" [https://www.sibenik.in/sibenik/sibencanin-denis-perisa-planira-izraditi-zastitne-maske-pomocu-3d-printera-za-osoblje-sibenske-bolnice/120424.html sibenik.in, March 24, 2020 (local)]</ref> that [[3D printers]] be borrowed from the [[Town Hall]], [[Public Library]] and [[City Museum]] 3D-printed face shields be produced. He and a group of people he assembled produced over 500 face shields for the local hospital and emergency services and for the nearby towns of [[Drniš]]<ref>"Drniš hospital gets 3D-Printed face-shields donation" [https://www.radiodrnis.hr/dom-zdravlja-drnis-dobio-novu-donaciju-zastitnih-3d-vizira/ Radio Drniš, April 8, 2020 (local)]</ref> and [[Knin]]. First shields he made for test were shipped to [[Murter]] as there was center of the local [[outbreak]]. He claims he barely got any sleep while making them day and night.<ref>"First 3D-Printed faceshields went to Murter" [https://www.sibenik.in/sibenik/prve-3d-zastitne-maske-su-otisle-na-murter-nisam-spavao-printam-cijelu-noc/120485.html sibenik.in, March 26, 2020 (local)]</ref><ref>"Denis plays his part in coronavirus outbreak" [https://sibenskiportal.hr/aktualno/sibencanin-daje-svoj-doprinos-u-borbi-protiv-epidemije-denis-perisa-printa-3d-vizire-za-lijecnike/ sibenik.in, March 24, 2020 (local)]</ref><ref>"3D printers works day and night for hospitals" [https://sibenski.slobodnadalmacija.hr/sibenik/vijesti/sibenik/3d-printeri-i-u-sibeniku-rade-punom-parom-medicinski-viziri-iz-manufakture-u-narancastoj-zgradi-1011934 Slobodna Dalmacija, March 26, 2020 (local)]</ref><ref>"Computer experts and designers in fight against coronavirus" [https://morski.hr/2020/03/25/hrvatski-informaticari-i-dizajneri-u-borbi-protiv-virusa-3d-printerima-izraduju-zastitnu-opremu-za-bolnice/ morski.hr, March, 2020 (local)]</ref>


=== Law and order ===
=== Law and order ===
Beginning in 2017, Denis worked on numerous cases for [[local police]] and DORH ([[State Attorney]]) by coming across and prosecuting online bullies and people spreading hate with possible use of physical violence towards others. Starting with a man who endorsed another man for the murder of his parents and encouraged others to do same to police officers. He spoke about how to report such crimes on National Television.<ref>HRT (Croatian National Television), about how to report hate speech [http://magazin.hrt.hr/383130/kako-prijaviti-govor-mrznje-na-drustvenim-mrezama HRT (National Television), April 10, 2017]</ref><ref>Denis in Labirint, HRT (National Television) about working with State Attorney (available on demand)[http://www.hrt.hr Labirint, HRT (National television) April 10, 2017]</ref><ref>"DarkMan files report on guy endorsing killing" [http://sibenski.slobodnadalmacija.hr/vijesti/sibenik/clanak/id/477565/denis-perisa-prijavio-dorh-u-momka-koji-je-na-fejsu-hvalio-ubojicu-iz-ciste-velike--to-je-klasicni-govor-mrznje-i-zagovaranje-zlocina Slobodna Dalmacija, March 30, 2017(local)]</ref><ref>Working with DORH (local) [http://100posto.hr/news/ovo-je-covjek-koji-je-prijavio-idiota-koji-je-na-facebooku-opravdavao-krvavi-zlocin-tina-sunjerge 100posto.hr, March 29, 2017]</ref> Shortly after he was threatened and was put under [[police protection]].<ref>"Day after reporting Denis ended under police protection" [http://www.prvi.hr/prvi-hr/top-stories/dan-nakon-prijave-nasilja-dorh-u-i-sam-zavrsio-pod-policijskom-zastitom prvi.hr March 30, 2017]</ref><ref>Only day after Denis needed and received police protection. [http://republika.eu/novost/63775/dan-nakon-prijave-nasilja-dorh-u-i-sam-zavrsio-pod-policijskom-zastitom republika.eu, March 30, 2017]</ref> Later on he was searching for fugitive [[Ivica Todorić]] and his online servers.<ref>In few minutes I found out location of Todorić server [http://100posto.hr/news/u-nekoliko-minuta-saznao-sam-gdje-je-registriran-todoricev-blog-lokacija-se-lako-pronade-a-postoje-i-kapitalne-greske-koje-ce-ga-razotkriti 100posto.hr, October 26, 2017]</ref>
Beginning in 2017, Periša worked on cases for local police and DORH (the [[state attorney]]) by coming across and prosecuting online bullies and people spreading hate with the possible use of physical violence towards others. He spoke about how to report such crimes on national television.<ref>HRT (Croatian National Television), about how to report hate speech [http://magazin.hrt.hr/383130/kako-prijaviti-govor-mrznje-na-drustvenim-mrezama HRT (national television), April 10, 2017]</ref><ref>Denis in Labirint on HRT about working with state attorney (available on demand) [http://www.hrt.hr Labirint, HRT (national television) April 10, 2017]</ref><ref>"DarkMan files report on guy endorsing killing" [http://sibenski.slobodnadalmacija.hr/vijesti/sibenik/clanak/id/477565/denis-perisa-prijavio-dorh-u-momka-koji-je-na-fejsu-hvalio-ubojicu-iz-ciste-velike--to-je-klasicni-govor-mrznje-i-zagovaranje-zlocina ''Slobodna Dalmacija'', March 30, 2017(local)]</ref><ref>Working with DORH [http://100posto.hr/news/ovo-je-covjek-koji-je-prijavio-idiota-koji-je-na-facebooku-opravdavao-krvavi-zlocin-tina-sunjerge 100posto.hr, March 29, 2017]</ref> Shortly after that, he was threatened and put under [[police protection]].<ref>"Day after reporting Denis ended up under police protection" [http://www.prvi.hr/prvi-hr/top-stories/dan-nakon-prijave-nasilja-dorh-u-i-sam-zavrsio-pod-policijskom-zastitom prvi.hr March 30, 2017]</ref><ref>The following day, Periša needed and received police protection. [http://republika.eu/novost/63775/dan-nakon-prijave-nasilja-dorh-u-i-sam-zavrsio-pod-policijskom-zastitom republika.eu, March 30, 2017]</ref> Later on, he searched for fugitive [[Ivica Todorić]] and the servers Todorić used.<ref>"In a few minutes I found the location of Todorić server" [http://100posto.hr/news/u-nekoliko-minuta-saznao-sam-gdje-je-registriran-todoricev-blog-lokacija-se-lako-pronade-a-postoje-i-kapitalne-greske-koje-ce-ga-razotkriti 100posto.hr, October 26, 2017]</ref>

=== [[Computer security]] ===
Denis founded the [[computer security]] website Jezgra.org at age 15. Throughout his life he was involved in [[public speaking]] and [[hacktivism]]<ref>"In campaign I've read mails of politicians" [http://www.denis.in/slike/mediji/glasdalmacije_naslovnica_manja.jpg Glas Dalmacije, December 11, 2007 (local)]</ref> along with activism.<ref>"I could hack a bank, but I don't want to be dirty fugitive" [http://www.denis.in/slike/mediji/glasdalmacije_br_3_big.jpg Glas Dalmacije, December 11, 2007 (local)]</ref>

He claims he was guilty for various online [[scandals]] like hacking folk music websites.<ref>"Šibenik hacker blamed for virtual scandals" [http://www.denis.in/slike/mediji/metro_express_br_50_big.jpg Metro Express, July 21, 2006 (local)]</ref> He also claims his computer skills were recognized after building [[firmware]] that could improve [[wireless]] strength of device (SE515 by [[Siemens]]) that was popular and very spread out in [[Croatia]] and that part of Europe.<ref>"GROTLO.net praising Denis in article" [http://www.denis.in/index_files/mediji-online/Grotlo_NET.htm GROTLO.net saved webpage, February 08, 2006 (local)]</ref>

He was often critical about [[Croatia]] [[secret services]] that they have no clue what is going on and are not prepared for current century.<ref>"Secret services have no clue about hacking" [http://www.denis.in/slike/mediji/vrime_br8.jpg Vrime, April 9, 2010 (local)]</ref>


===Political standoff===
===Political standoff===
In August 2010, Denis in his own words claims he publicly whistle blew [[Social Democratic Party]] (SDP) for overspending the local [[city budget]] on town [[wireless network]] saying that they are throwing away money and giving it to their party member and it will all be for nothing.<ref>"City gave money to their local [[Social Democratic Party]] member for nothing" [http://www.denis.in/slike/mediji/sibenski_list_14082010_big.jpg Šibenski List, August 14, 2010 (local)]</ref> He privately mailed the city mayor<ref>Correspondence with city Mayor which Denis sent prior to building wireless network [http://www.si-wifi.org/dokumenti/korespondencije/Gradonacelnik_WIFI_Dopis.pdf PDF (local)]</ref> on which the mayor replied rough with no interest.<ref>Correspondence – city Mayor replies to Denis [http://www.si-wifi.org/dokumenti/korespondencije/odgovor_gradonacelnika.jpg Scanned Letter (local)]</ref> That gave Denis steam to publicly confront city Mayor Ante Županović
In August 2010, Periša claimed that he [[whistleblowing|blew the whistle]] on the [[Social Democratic Party]] (SDP) for overspending the local municipal budget on a [[wireless network]].<ref>"City gave money to their local Social Democratic Party member for nothing" [http://www.denis.in/slike/mediji/sibenski_list_14082010_big.jpg Šibenski List, August 14, 2010]</ref> He informed the city mayor privately,<ref>Correspondence with city Mayor which Periša sent prior to building wireless network [http://www.si-wifi.org/dokumenti/korespondencije/Gradonacelnik_WIFI_Dopis.pdf PDF]</ref> to which the mayor replied roughly with no interest.<ref>Correspondence – city mayor replies to Denis [http://www.si-wifi.org/dokumenti/korespondencije/odgovor_gradonacelnika.jpg Scanned letter]</ref> Periša then publicly confronted city Mayor Ante Županović<ref>"Ante Županović – new city Mayor" [http://www.tportal.hr/vijesti/hrvatska/25210/Ante-zupanovic-novi-gradonacelnik-sibenika.html T-portal, June 15, 2009]</ref> to accuse him of stealing public money.<ref>"With 50.000kn I could network three towns, not just one" [http://www.denis.in/slike/mediji/slobodna_dalmacija_4_big.jpg ''Slobodna Dalmacija'', August 11, 2010]</ref>
<ref>"Ante Županović – new city Mayor" [http://www.tportal.hr/vijesti/hrvatska/25210/Ante-zupanovic-novi-gradonacelnik-sibenika.html T-portal, June 15, 2009 (local)]</ref> and said they are [[stealing]] money.<ref>"With 50.000kn I could network three towns not just one" [http://www.denis.in/slike/mediji/slobodna_dalmacija_4_big.jpg Slobodna Dalmacija, August 11, 2010 (local)]</ref>


He turned out to be right in 2013 after local [[news paper]] tested out existing [[wireless network]] and concluded it was not working.<ref>"City wireless is non-working" [http://www.denis.in/slike/mediji/novi_tjednik_25-09-2013_big.jpg Novi Tjednik, September 25, 2013 (local)]</ref> After local political scene changed to [[Croatian Democratic Union]] (HDZ) it became apparent that Denis will be next man in charge of rebuilding and [[maintaining]] local city [[wireless]] as most competent. So he did just that in late 2014.<ref>"Denis covers city core with WIFI signal" [http://www.denis.in/slike/mediji/denis_gradski_wireless_22.05.2014-Slobodna_dalmacija.jpg Slobodna Dalmacija, May 22, 2014 (local)]</ref> More info below.
He turned out to be right in 2013 after a local [[news paper]] tested out the existing [[wireless network]] and concluded it was not working.<ref>"City wireless is non-working" [http://www.denis.in/slike/mediji/novi_tjednik_25-09-2013_big.jpg Novi Tjednik, September 25, 2013]</ref> After the [[Croatian Democratic Union]] (HDZ) took power, Periša was appointed to rebuild and maintain the local city [[wireless]], which he did in late 2014.<ref>"Denis covers city core with wi-fi signal" [http://www.denis.in/slike/mediji/denis_gradski_wireless_22.05.2014-Slobodna_dalmacija.jpg ''Slobodna Dalmacija'', May 22, 2014]</ref>


===[[Anonymous group]]===
===Anonymous group===
After decade of claiming to lead hacking groups Denis claims he finally joined [[Anonymous group]] firstly fighting against [[ACTA]] and similar acts.<ref>"Anonymous are modern Robin Hoods" [http://www.sibenik.in/hrvatska/Anonymousi-su-moderni-robin-hoodi/1451.html sibenik.in, February 22, 2012 (local)]</ref> He endorses and [[motivate]] people to start using [[Linux OS]] if nothing then for lower [[power consumption]] and better [[power saving]].<ref>"Savings: Denis advices switch to Linux" [http://mok.hr/vijesti/item/7686-tednja-denis-peria-savjetuje-prelazak-na-linux mok.hr, November 04, 2010 (local)]</ref> On June 4, 2015 Denis appeared on a [[skype]] interview for "Alter EGO" show talking about internet and anonymous representing himself as one of internet freedom fighters.<ref>"Alter EGO 04.06.2015" [https://vimeo.com/album/3341181/video/129699043 Alter_EGO, Jun 04, 2015 (local)]</ref>
After a decade of claiming to lead hacking groups, Periša claims he finally joined the [[Anonymous group]] firstly fighting against [[ACTA]] and similar acts.<ref>"Anonymous are modern Robin Hoods" [http://www.sibenik.in/hrvatska/Anonymousi-su-moderni-robin-hoodi/1451.html sibenik.in, February 22, 2012]</ref> He encourages people to use the [[Linux OS]] for supposedly lower [[power consumption]] and better [[power saving|power savings]].<ref>"Savings: Denis advices switch to Linux" [http://mok.hr/vijesti/item/7686-tednja-denis-peria-savjetuje-prelazak-na-linux mok.hr, November 04, 2010]</ref> On June 4, 2015, Periša appeared on a [[Skype]] interview for the ''Alter EGO'' show talking about the internet and anonymously representing himself as one of the internet freedom fighters.<ref>''Alter EGO'' 04.06.2015 [https://vimeo.com/album/3341181/video/129699043 Alter_EGO, June 04, 2015]</ref>


===[[Atheism]]===
==Innovations==
Denis is declared atheist and is strongly opposed to [[Catholic church]]. Lately Denis introduced himself to public as one of atheist [[activist]] in his home town. -"Atheist wing of Croatia in starts its branch in town [[Šibenik]]".<ref>"Atheist wing of Croatia in starts its branch in Sibenik" [http://www.sibenik.in/sibenik/foto-ateisticka-inicijativa-hrvatske-pocela-djelovati-i-u-sibeniku/45846.html sibenik.in, August 12, 2015 (local)]</ref>

===[[ACTA]]===
In early 2012 Denis was strongly against [[ACTA]] and similar acts claiming that if we start to censor Internet, we can say goodbye to democracy.<ref>"If we start to censor Internet, we can say goodbye to democracy" [http://www.denis.in/slike/mediji/novi_tjednik_23-02-2012-big.jpg Novi Tjednik, February 23, 2012 (local)]</ref>

==Innovations and Technology==


===LoRaWAN===
===LoRaWAN===
In January 2019, Periša built and installed a new type of sensor network for the town of Šibenik. The technology is [[LoRaWAN]] and it's based on an 868Mhz version for this part of the world. Grad Šibenik was the first town to do such a thing in this part of the world.<ref>"Sibenik just entered the future of the Internet" [https://www.sibenik.in/tehnologija/sibenik-je-upravo-zakoracio-u-buducnost-interneta-i-postao-pametni-grad-denis-perisa-nam-je-sve-pojasnio%20%20%20%20/103715.html sibenik.in, March 17, 2019]</ref><ref>"Sibensko Kninske Kronike 08" [https://www.youtube.com/watch?v=t1M9wyRFels youtube.com, February 24, 2019]</ref><ref>"Sibenik and LoRaWAN future" [https://sibenski.slobodnadalmacija.hr/vijesti/sibenik/clanak/id/592564/sibenik-uvodi-sustavnbsplorawan-na-toj-korisnicima-besplatnoj-mrezi-sa-smart-telefona-ili-laptopa-moguce-je-preko-jeftinih-senzora-od-svega-stotinjak-kuna-upravljati-pomicanjem-roleta-otvaranjem-prozora-rasvjetom-i-kucanskim-ureajima sibenski.slobodnadalmacija.hr, March 03, 2019 (local)]</ref><ref>"Official The Things Network Sibenik Site" [https://www.thethingsnetwork.org/community/sibenik/ TTN Network, Jan, 2019]</ref>
In January 2019 Grad Šibenik with association of Mr. Denis Periša built and put public a new type of sensors network for the whole town to use.
Technology is [[LoRaWAN]] and it's based on 868Mhz version for this part of the world. Grad Šibenik was first town to do such thing in this part of world.<ref>"Sibenik just entered future of Internet" [https://www.sibenik.in/tehnologija/sibenik-je-upravo-zakoracio-u-buducnost-interneta-i-postao-pametni-grad-denis-perisa-nam-je-sve-pojasnio%20%20%20%20/103715.html sibenik.in, March 17, 2019 (local)]</ref><ref>"SIBENSKO KNINSKE KRONIKE 08" [https://www.youtube.com/watch?v=t1M9wyRFels youtube.com, February 24, 2019 (local)]</ref><ref>"Sibenik and LoRaWAN future" [https://sibenski.slobodnadalmacija.hr/vijesti/sibenik/clanak/id/592564/sibenik-uvodi-sustavnbsplorawan-na-toj-korisnicima-besplatnoj-mrezi-sa-smart-telefona-ili-laptopa-moguce-je-preko-jeftinih-senzora-od-svega-stotinjak-kuna-upravljati-pomicanjem-roleta-otvaranjem-prozora-rasvjetom-i-kucanskim-ureajima sibenski.slobodnadalmacija.hr, March 03, 2019 (local)]</ref><ref>"Official The Things Network Sibenik Site" [https://www.thethingsnetwork.org/community/sibenik/ TTN NETWORK, Jan, 2019 (local)]</ref>


===Biohacking===
===Biohacking===
On 7 October Denis implanted an xNT NFC chip inside his hand and was first to speak about it on national television and other media.<ref>"First Croatian Cyberfinger" [https://www.jutarnji.hr/life/zivotne-price/video-denis-perisa-je-prvi-hrvatski-cyberprst-ugradio-sam-cip-u-ruku-njime-placam-racune-otkljucavam-vrata/9463988/ Jutarnji.hr, Oct, 2019 (local)]</ref>
On 7 October 2019, Periša implanted an xNT NFC chip in his hand and discussed it on national television and other media.<ref>"First Croatian Cyberfinger" [https://www.jutarnji.hr/life/zivotne-price/video-denis-perisa-je-prvi-hrvatski-cyberprst-ugradio-sam-cip-u-ruku-njime-placam-racune-otkljucavam-vrata/9463988/ Jutarnji.hr, Oct, 2019 (local)]</ref>


===Wireless===
===Wireless===
Periša was the founder and president of the ŠI-WIFI organization from 21 July 2005 until 20 November 2017, when it was closed and a new city network was established.<ref>[https://www.si-wifi.org/dokumenti/siwifi-2005-2018.pdf official document]</ref> Periša built a free town [[wireless network]] with city funds in April 2014. The network was placed on 10 public nodes with 30 public antennas and access points.<ref>"Mother of all networks" [https://sibenskiportal.rtl.hr/2014/04/27/mreza-svih-mreza-besplatni-gradski-wireless-napokon-u-funkciji/ sibenskiportal.rtl.hr, April 27, 2014 (local)]</ref><ref>"City covered with wifi network" [https://www.slobodnadalmacija.hr/dalmacija/sibenik/clanak/id/235571/gradska-jezgra-sibenika-pokrivena-besplatnom-wi-fi-mrezom sibenskiportal.rtl.hr, May 23, 2014]</ref>
Denis was founder and President of ŠI-WIFI organization from July 21, 2005 till November 20, 2017 when it was closed and new city network was risen.
.<ref>[https://www.si-wifi.org/dokumenti/siwifi-2005-2018.pdf "OFFICIAL DOCUMENT"]</ref>

Denis build free town [[wireless network]] with city funds in April 2014. Network was placed on 10 public nodes with 30 public antennas and access points.
.<ref>"Mother of all networks" [https://sibenskiportal.rtl.hr/2014/04/27/mreza-svih-mreza-besplatni-gradski-wireless-napokon-u-funkciji/ sibenskiportal.rtl.hr, April 27, 2014 (local)]</ref><ref>"City covered with wifi network" [https://www.slobodnadalmacija.hr/dalmacija/sibenik/clanak/id/235571/gradska-jezgra-sibenika-pokrivena-besplatnom-wi-fi-mrezom sibenskiportal.rtl.hr, May 23, 2014 (local)]</ref>

==Public speaking==

===Television===
Denis did live hacking on national [[television]] ([[RTL Group|RTL]]) and did a MITM attack demonstration on 14 of May 2019.<ref>"DARKMAN shows how to hack mobile phone or some profile" [https://vijesti.rtl.hr/potraga/3449945/sa-16-hakirao-zastupnika-a-sad-radi-za-policiju-darkman-otkrio-kako-provaliti-u-neciji-profil-ili-mobitel/ RTL TELEVISION, May 14, 2019 (local)]</ref> He was featured on all mayor local portal news sites.<ref>"With 16 he hacked known politician and is now working for police" [https://www.sibenik.in/sibenik/sa-16-godina-hakirao-zastupnika-a-Sad-radi-za-policiju-Darkman-otkrio-kako-provaliti-u-neciji-profil-ili-mobitel/107040.html sibenik.in, May 14, 2019 (local)]</ref><ref>"Croatian hacker showed how he can hack your mobile phone" [http://www.poslovni.hr/tehnologija/hrvatski-haker-pokazao-kako-vam-moze-provaliti-u-mobitel-353189 POSLOVNI.hr, May 14, 2019 (local)]</ref><ref>"DARKMAN shows how to hack mobile phone or some profile" [https://www.index.hr/vijesti/clanak/hrvatski-haker-pokazao-kako-vam-moze-provaliti-u-mobitel/2085616.aspx index.hr, May 14, 2019 (local)]</ref>
<br>In October 2019 Denis was a guest on local TV station "[[TV Jadran]]" <ref>"TV Jadran official website" [http://www.tvjadran.hr/ TV Jadran, October, 2019 (local)]</ref> show named "Poteštat" <ref>"TV Jadran official website of Poteštat TV show" [http://www.tvjadran.hr/09/category/potestat/ TV Jadran, October, 2019 (local)]</ref> with host Robert Škurla talking about [[Body hacking|biohacking]], [[5G]], [[Huawei]] and many other subjects.<ref>"TV Jadran - Poteštat TV show on Youtube" [https://www.youtube.com/watch?v=Jc1ifinpkUg TV Jadran, "Poteštat" show, October, 2019 (local)]</ref><br>In December 2019 Denis was a guest on an online show "Na terapiji" with Mario Krnić<ref>"On Therapy hosts hacker Denis Periša DARKMAN, man with a chip in his hand" [https://www.sibenik.in/sibenik/kod-krnica-na-terapiju-dolazi-denis-perisa-darkman-covjek-s-ugra-enim-cipom-u-ruci/116109.html sibenik.in, December 11, 2019 (local)]</ref><ref>"Denis revealed why he uses his implant for and can he hack in someones Facebook" [https://www.sibenik.in/sibenik/otkrio-cemu-mu-sluzi-cip-u-saci-moze-li-provaliti-na-neciji-fejs-profil-zasto-je-kao-maloljetnik-imao-posla-s-policijom/116495.html sibenik.in, December 19, 2019 (local)]</ref>

===Fališ (Festival of Alternative and Left)===
In September 2020<ref>"Fališ Festival of Alternate and Left" [https://www.falis.com.hr/?tip=stranica&id=42&title=program Fališ, September 03, 2020. (local)]</ref> Denis did first ever public live Interview on stand for the "Fališ" festival of alternative and left. This was in his home town [[Šibenik]], [[Croatia]].<br>Subject was "All big brothers are watching us".
There was topics ranging from biohacking to [[5G]].<ref>"Festival of alternative and left" [https://www.novilist.hr/ostalo/kultura/ostalo-kultura/festival-alternative-i-ljevice-falis-ide-unatoc-slozenoj-epidemioloskoj-situaciji/ Novi List, August 18, 2020. (local)]</ref><ref>"Fališ festival article" [https://lupiga.com/intervjui/emir-imamovic-pirke-uoci-falisa-od-teologije-do-ekonomije-od-hakiranja-i-teorija-zavjere-do-povijesti-od-amerike-do-knina Lupiga (local)]</ref><ref>"Falis festival is on. From Theology to econnomy to hacking and conspiracy theory to history" [http://tris.com.hr/2020/08/falis-nece-falit-hoce-li-festivala-biti-eto-hoce-mora/ Tris, August 2020. (local)]</ref>


==Public appearances==
===Potrošači Digitalnog Doba===
In 2014, Periša began appearing at conferences, giving a guest lecture at the [[Split Film Festival]] (STFF) on the subject of "Hacking and (Privacy) Protection".<ref>{{cite web|title=Hacking and (Privacy) Protection – lecture |url=http://www.splitfilmfestival.hr/index.php?option=com_content&view=article&id=1045:denis-peria&catid=174:special-programme-14&lang=en |website=splitfilmfestival.hr |date=4 September 2014}}</ref><ref>"Denis Periša is giving lecture on hacking on Split Film Festival" [http://www.sibenik.in/sibenik/sibencanin-denis-perisa-drzi-predavanje-o-hakiranju-na-splitskom-filmskom-festivalu/27499.html sibenik.in, September 04, 2014]</ref><ref>Organizer mentioning Denis Periša as a guest speaker of STFF in local newspaper [http://slobodnadalmacija.hr/Scena/Kultura/tabid/81/articleType/ArticleView/articleId/257026/Default.aspx ''Slobodna Dalmacija'', September 13, 2014]</ref> He was interviewed about the same subject by ''H-Alter'' magazine with the subject "Table to table via smartphones", commenting on his previous work and the [[WikiLeaks]] arrests which had taken place shortly before that.<ref>"Table to table via smartphones" [http://www.h-alter.org/vijesti/stol-do-stola-putem-mobitela H-Alter, September 19, 2014]</ref>
In November 2019<ref>"Udruga Zvonimir" [https://zvonimir.hr/novosti/udruga/potrosaci-digitalnog-doba Udruga Zvonimir, November 27, 2019. (local)]</ref> Denis was asked to do live presentation and lecture on "Potrošači Digitalnog Doba" in [[Split, Croatia]] with subject of personal protection and Internet news, hacks and biohacking.<ref>"Potrošači digitalnog doba conference" [https://www.hup.hr/25112019-konferencija-potrosaci-digitalnog-doba-kinoteka-zlatna-vrata-dioklecijanova-1-split-1700-sati.aspx hup.hr, November 25, 2019. (local)]</ref><ref>"Famous hacker on lecture in Split" [https://slobodnadalmacija.hr/split/poznati-sibenski-haker-na-predavanju-u-splitu-i-printeri-nas-mogu-spijunirati-nbsp-na-svakom-koraku-nailazim-na-nedostatke-u-rjesenjima-koja-nbsp-su-ponudena-nbsp-gradanima-635022 Slobodna Dalmacija, November 26, 2019. (local)]</ref><ref>"Central Consumers Portal Croatia" [https://www.szp.hr/aktualno/poziv-na-konferenciju-potrosaci-digitalnog-doba/573 Središnji portal za potrošače, November 2019. (local)]</ref>


In the summer of 2014, Periša was invited to do a video presentation on the island of [[Prvić]] on the subject of hacking and creative thinking.<ref>"In search of lost communication" [http://tris.com.hr/2014/10/dan-na-otoku-prvicu-u-potrazi-za-izgubljenom-komunikacijom/ tris.com.hr, October 10, 2014]</ref>
===STFF (SpliT Film Festival)===
In 2014 Denis started [[public speaking]] on some conferences. He was first invited to lecture in [[Split, Croatia]] on STFF ([[Split Film Festival]]) as a [[guest speaker]] with subject "HACKING AND THE (PRIVACY) PROTECTION" lasting two hours.<ref>Intro to lecture on English and Croatian language [https://www.youtube.com/watch?v=ZiczVsfjKzI YouTube recording, September 19, 2014 (English and local)]</ref><ref>"HACKING AND THE (PRIVACY) PROTECTION – lecture" [http://www.splitfilmfestival.hr/index.php?option=com_content&view=article&id=1045:denis-peria&catid=174:special-programme-14&lang=en splitfilmfestival.hr, September 04, 2014 (ENGLISH)]</ref><ref>"Denis Periša is giving lecture on hacking on Split Film Festival" [http://www.sibenik.in/sibenik/sibencanin-denis-perisa-drzi-predavanje-o-hakiranju-na-splitskom-filmskom-festivalu/27499.html sibenik.in, September 04, 2014 (local)]</ref><ref>Organizer mentioning Denis Periša as a guest speaker of STFF in local newspaper [http://slobodnadalmacija.hr/Scena/Kultura/tabid/81/articleType/ArticleView/articleId/257026/Default.aspx Slobodna Dalmacija, September 13, 2014 (local)]</ref> After which he gave interview with same subject to H-Alter magazine with subject "Table to table via smartphones" where he commented all his previous work along with recent [[WikiLeaks]] [[arrests]].<ref>"Table to table via smartphones" [http://www.h-alter.org/vijesti/stol-do-stola-putem-mobitela H-Alter, September 19, 2014 (local)]</ref>


Periša conducted a live hack on the [[RTL Group|RTL]] television channel and did a demonstration of an [[MITM attack]] on 14 May 2019.<ref>"DARKMAN shows how to hack mobile phone or some profile" [https://vijesti.rtl.hr/potraga/3449945/sa-16-hakirao-zastupnika-a-sad-radi-za-policiju-darkman-otkrio-kako-provaliti-u-neciji-profil-ili-mobitel/ RTL TELEVISION, May 14, 2019] {{Webarchive|url=https://web.archive.org/web/20190514202309/https://vijesti.rtl.hr/potraga/3449945/sa-16-hakirao-zastupnika-a-sad-radi-za-policiju-darkman-otkrio-kako-provaliti-u-neciji-profil-ili-mobitel/ |date=May 14, 2019 }}</ref><ref>"At 16 he hacked a politician and is now working for police" [https://www.sibenik.in/sibenik/sa-16-godina-hakirao-zastupnika-a-Sad-radi-za-policiju-Darkman-otkrio-kako-provaliti-u-neciji-profil-ili-mobitel/107040.html sibenik.in, May 14, 2019]</ref><ref>"Croatian hacker showed how he can hack your mobile phone" [http://www.poslovni.hr/tehnologija/hrvatski-haker-pokazao-kako-vam-moze-provaliti-u-mobitel-353189 POSLOVNI.hr, May 14, 2019]</ref><ref>{{cite web|title=Hrvatski haker pokazao kako vam može provaliti u mobitel |url=https://www.index.hr/vijesti/clanak/hrvatski-haker-pokazao-kako-vam-moze-provaliti-u-mobitel/2085616.aspx |website=index.hr |date=14 May 2019 |lang=hr}}</ref>
===KDFV (Creative Days of Faust Vrančić)===
In summer 2014 Denis was invited to do another video [[presentation]] [[public speaking]], this time on island [[Prvić]] with subject of hacking and [[creative thinking]].<ref>"In search for lost communication" [http://tris.com.hr/2014/10/dan-na-otoku-prvicu-u-potrazi-za-izgubljenom-komunikacijom/ tris.com.hr, October 10, 2014 (local)]</ref>


In November 2019,<ref>"Udruga Zvonimir" [https://zvonimir.hr/novosti/udruga/potrosaci-digitalnog-doba Udruga Zvonimir, November 27, 2019. (local)]</ref> Periša gave a live presentation and lecture on "Potrošači Digitalnog Doba" in [[Split, Croatia]], on the subject of personal protection and Internet news, hacks and biohacking.<ref>"Potrošači digitalnog doba conference" [https://www.hup.hr/25112019-konferencija-potrosaci-digitalnog-doba-kinoteka-zlatna-vrata-dioklecijanova-1-split-1700-sati.aspx hup.hr, November 25, 2019]</ref><ref>"Famous hacker on lecture in Split" [https://slobodnadalmacija.hr/split/poznati-sibenski-haker-na-predavanju-u-splitu-i-printeri-nas-mogu-spijunirati-nbsp-na-svakom-koraku-nailazim-na-nedostatke-u-rjesenjima-koja-nbsp-su-ponudena-nbsp-gradanima-635022 ''Slobodna Dalmacija'', November 26, 2019]</ref><ref>"Central Consumers Portal Croatia" [https://www.szp.hr/aktualno/poziv-na-konferenciju-potrosaci-digitalnog-doba/573 Središnji portal za potrošače, November 2019]</ref>
===Photo lecture (Domald)===
Another video [[presentation]] [[public speaking]], this time in public [[caffe bar]] "Domald" in Šibenik with subject of basic and advanced photography.<ref>"Come to photo lecture and workshop" [http://www.sibenik.in/sibenik/zanima-vas-fotografija-dodite-na-predavanje-i-radionicu-foto-kluba-sibenik-veceras-u-domalda/38911.html sibenik.in, April 13, 2015 (local)]</ref>


==References==
==References==
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[[Category:Living people]]
[[Category:Living people]]
[[Category:1983 births]]
[[Category:1983 births]]
[[Category:Ransomware]]

Latest revision as of 01:41, 15 December 2024

Denis Periša
Born
Denis Periša

(1983-07-23) July 23, 1983 (age 41)
Šibenik, SR Croatia, Yugoslavia (now Croatia)
NationalityCroatian
CitizenshipCroatian
Occupation(s)Computer hacker and whistle blower
Known forHactivism
MovementAnonymous
RelativesTina Periša (sister)
Websitewww.denis.in

Denis Periša (born July 23, 1983) is a political activist, whistle blower and computer hacker from Šibenik, Croatia. He was convicted and criminally charged in September 1999.[1][2][3][4] He was forbidden the use of any form of computer system or the internet for hacking the e-mail of politician Veselin Pejnović while planting a backdoor to his network. He founded the computer security website Jezgra.org in 1997. In 2005, he founded ŠI-WIFI wireless, an organization that was formed for his town.[5][6]

Activism

[edit]

During the COVID-19 pandemic, as part of a group, Periša made 3D-printed face shields for the local hospitals in Drniš and Knin.[7][8][9][10][11][12]

Law and order

[edit]

Beginning in 2017, Periša worked on cases for local police and DORH (the state attorney) by coming across and prosecuting online bullies and people spreading hate with the possible use of physical violence towards others. He spoke about how to report such crimes on national television.[13][14][15][16] Shortly after that, he was threatened and put under police protection.[17][18] Later on, he searched for fugitive Ivica Todorić and the servers Todorić used.[19]

Political standoff

[edit]

In August 2010, Periša claimed that he blew the whistle on the Social Democratic Party (SDP) for overspending the local municipal budget on a wireless network.[20] He informed the city mayor privately,[21] to which the mayor replied roughly with no interest.[22] Periša then publicly confronted city Mayor Ante Županović[23] to accuse him of stealing public money.[24]

He turned out to be right in 2013 after a local news paper tested out the existing wireless network and concluded it was not working.[25] After the Croatian Democratic Union (HDZ) took power, Periša was appointed to rebuild and maintain the local city wireless, which he did in late 2014.[26]

Anonymous group

[edit]

After a decade of claiming to lead hacking groups, Periša claims he finally joined the Anonymous group firstly fighting against ACTA and similar acts.[27] He encourages people to use the Linux OS for supposedly lower power consumption and better power savings.[28] On June 4, 2015, Periša appeared on a Skype interview for the Alter EGO show talking about the internet and anonymously representing himself as one of the internet freedom fighters.[29]

Innovations

[edit]

LoRaWAN

[edit]

In January 2019, Periša built and installed a new type of sensor network for the town of Šibenik. The technology is LoRaWAN and it's based on an 868Mhz version for this part of the world. Grad Šibenik was the first town to do such a thing in this part of the world.[30][31][32][33]

Biohacking

[edit]

On 7 October 2019, Periša implanted an xNT NFC chip in his hand and discussed it on national television and other media.[34]

Wireless

[edit]

Periša was the founder and president of the ŠI-WIFI organization from 21 July 2005 until 20 November 2017, when it was closed and a new city network was established.[35] Periša built a free town wireless network with city funds in April 2014. The network was placed on 10 public nodes with 30 public antennas and access points.[36][37]

Public appearances

[edit]

In 2014, Periša began appearing at conferences, giving a guest lecture at the Split Film Festival (STFF) on the subject of "Hacking and (Privacy) Protection".[38][39][40] He was interviewed about the same subject by H-Alter magazine with the subject "Table to table via smartphones", commenting on his previous work and the WikiLeaks arrests which had taken place shortly before that.[41]

In the summer of 2014, Periša was invited to do a video presentation on the island of Prvić on the subject of hacking and creative thinking.[42]

Periša conducted a live hack on the RTL television channel and did a demonstration of an MITM attack on 14 May 2019.[43][44][45][46]

In November 2019,[47] Periša gave a live presentation and lecture on "Potrošači Digitalnog Doba" in Split, Croatia, on the subject of personal protection and Internet news, hacks and biohacking.[48][49][50]

References

[edit]
  1. ^ Večernji list, September 17, 1999 "Sixteen-year-old hacker broke in to personal computer and network of Veselin Pejnović"
  2. ^ Jutarnji list, September 18, 1999 "Hackers are thieves"
  3. ^ Slobodna Dalmacija, September 18, 1999 "Break in program of Veselin Pejnović was accidental"
  4. ^ Slobodna Dalmacija, September 19, 1999 "Šibenik hacker gets criminally charged"
  5. ^ Slobodna Dalmacija, May 23, 2014 "Šibenik city core covered by WIFI"
  6. ^ Metro Express, March 15, 2007 (local) "They use WIFI to wirelessly network whole town of Šibenik"
  7. ^ "Denis plans to make face shields for the local hospital" sibenik.in, March 24, 2020
  8. ^ "Drniš hospital gets 3D-Printed face-shields donation" Radio Drniš, April 8, 2020
  9. ^ "First 3D-Printed faceshields went to Murter" sibenik.in, March 26, 2020
  10. ^ "Denis plays his part in coronavirus outbreak" sibenik.in, March 24, 2020
  11. ^ "3D printers work day and night for hospitals" Slobodna Dalmacija, March 26, 2020
  12. ^ "Computer experts and designers in fight against coronavirus" morski.hr, March, 2020
  13. ^ HRT (Croatian National Television), about how to report hate speech HRT (national television), April 10, 2017
  14. ^ Denis in Labirint on HRT about working with state attorney (available on demand) Labirint, HRT (national television) April 10, 2017
  15. ^ "DarkMan files report on guy endorsing killing" Slobodna Dalmacija, March 30, 2017(local)
  16. ^ Working with DORH 100posto.hr, March 29, 2017
  17. ^ "Day after reporting Denis ended up under police protection" prvi.hr March 30, 2017
  18. ^ The following day, Periša needed and received police protection. republika.eu, March 30, 2017
  19. ^ "In a few minutes I found the location of Todorić server" 100posto.hr, October 26, 2017
  20. ^ "City gave money to their local Social Democratic Party member for nothing" Šibenski List, August 14, 2010
  21. ^ Correspondence with city Mayor which Periša sent prior to building wireless network PDF
  22. ^ Correspondence – city mayor replies to Denis Scanned letter
  23. ^ "Ante Županović – new city Mayor" T-portal, June 15, 2009
  24. ^ "With 50.000kn I could network three towns, not just one" Slobodna Dalmacija, August 11, 2010
  25. ^ "City wireless is non-working" Novi Tjednik, September 25, 2013
  26. ^ "Denis covers city core with wi-fi signal" Slobodna Dalmacija, May 22, 2014
  27. ^ "Anonymous are modern Robin Hoods" sibenik.in, February 22, 2012
  28. ^ "Savings: Denis advices switch to Linux" mok.hr, November 04, 2010
  29. ^ Alter EGO 04.06.2015 Alter_EGO, June 04, 2015
  30. ^ "Sibenik just entered the future of the Internet" sibenik.in, March 17, 2019
  31. ^ "Sibensko Kninske Kronike 08" youtube.com, February 24, 2019
  32. ^ "Sibenik and LoRaWAN future" sibenski.slobodnadalmacija.hr, March 03, 2019 (local)
  33. ^ "Official The Things Network Sibenik Site" TTN Network, Jan, 2019
  34. ^ "First Croatian Cyberfinger" Jutarnji.hr, Oct, 2019 (local)
  35. ^ official document
  36. ^ "Mother of all networks" sibenskiportal.rtl.hr, April 27, 2014 (local)
  37. ^ "City covered with wifi network" sibenskiportal.rtl.hr, May 23, 2014
  38. ^ "Hacking and (Privacy) Protection – lecture". splitfilmfestival.hr. September 4, 2014.
  39. ^ "Denis Periša is giving lecture on hacking on Split Film Festival" sibenik.in, September 04, 2014
  40. ^ Organizer mentioning Denis Periša as a guest speaker of STFF in local newspaper Slobodna Dalmacija, September 13, 2014
  41. ^ "Table to table via smartphones" H-Alter, September 19, 2014
  42. ^ "In search of lost communication" tris.com.hr, October 10, 2014
  43. ^ "DARKMAN shows how to hack mobile phone or some profile" RTL TELEVISION, May 14, 2019 Archived May 14, 2019, at the Wayback Machine
  44. ^ "At 16 he hacked a politician and is now working for police" sibenik.in, May 14, 2019
  45. ^ "Croatian hacker showed how he can hack your mobile phone" POSLOVNI.hr, May 14, 2019
  46. ^ "Hrvatski haker pokazao kako vam može provaliti u mobitel". index.hr (in Croatian). May 14, 2019.
  47. ^ "Udruga Zvonimir" Udruga Zvonimir, November 27, 2019. (local)
  48. ^ "Potrošači digitalnog doba conference" hup.hr, November 25, 2019
  49. ^ "Famous hacker on lecture in Split" Slobodna Dalmacija, November 26, 2019
  50. ^ "Central Consumers Portal Croatia" Središnji portal za potrošače, November 2019
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