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{{about|a subsidiary of [[Twitter]]|the [[open-source software]] project|Open Whisper Systems}}
{{distinguish|text=[[Open Whisper Systems]], the open-source software group that started [[Signal (messaging app)|Signal]], or [[Whisper (app)|Whisper]], a product of WhisperText LLC}}
{{short description|American enterprise mobile security company}}
{{Infobox company
{{Infobox company
| name = Whisper Systems
| name = Whisper Systems
| founders = [[Moxie Marlinspike]] and Stuart Anderson
| founders = {{Plain list |
* [[Moxie Marlinspike]]
* Stuart Anderson
⚫
}}
| location_city = [[San Francisco, California|San Francisco]], [[California]]
| location_city = [[San Francisco, California|San Francisco]], [[California]]
| location_country = [[United States|U.S.]]
| location_country = [[United States|U.S.]]
Line 8: Line 12:
| fate = Acquired by [[Twitter]]
| fate = Acquired by [[Twitter]]
| defunct = {{end date|2011|11|28}}
| defunct = {{end date|2011|11|28}}
| industry = [[Encryption software]], [[Mobile software]], [[Mobile security]]
| industry = [[Encryption software]], [[Mobile software]], [[Mobile security]]
| website = {{URL|http://www.whispersys.com/}}<br />See {{webarchive |url=https://web.archive.org/web/20130117185856/http://www.whispersys.com/ |date=17 January 2013 }}
}}
}}

'''Whisper Systems''' was an enterprise mobile security company that was acquired by [[Twitter]] in November 2011.<ref name="Tom Cheredar">{{cite web|date=November 28, 2011 | author=Tom Cheredar |url=http://venturebeat.com/2011/11/28/twitter-buys-whisper-systems/ |title=Twitter acquires Android security startup Whisper Systems |publisher=VentureBeat |accessdate=2011-12-21}}</ref><ref>{{cite web |url=http://thenextweb.com/twitter/2011/11/28/twitter-acquires-mobile-data-security-gurus-whisper-systems/ |title=Twitter acquires mobile data security gurus Whisper Systems |author=Brad McCarty |date= 28 November 2011 |accessdate= 16 January 2015}}</ref> The company was co-founded by security researcher [[Moxie Marlinspike]] and roboticist Stuart Anderson in 2010.<ref name="wired1" /> Some of Whisper Systems' software was made available under [[open-source software|open-source licenses]] after the acquisition.<ref name="mashable1" />
'''Whisper Systems''' was an American enterprise mobile security company that was co-founded by security researcher [[Moxie Marlinspike]] and roboticist Stuart Anderson in 2010.<ref name="wired1" /> The company was acquired by [[Twitter]] in November 2011.<ref name="venturebeat1">{{cite web|date=November 28, 2011 | author=Tom Cheredar |url=https://venturebeat.com/2011/11/28/twitter-buys-whisper-systems/ |title=Twitter acquires Android security startup Whisper Systems |publisher=VentureBeat |access-date=2011-12-21}}</ref><ref>{{cite web |url=https://thenextweb.com/twitter/2011/11/28/twitter-acquires-mobile-data-security-gurus-whisper-systems/ |title=Twitter acquires mobile data security gurus Whisper Systems |author=Brad McCarty |date= 28 November 2011 |access-date= 16 January 2015}}</ref><ref>{{Cite news|url=https://www.scmagazine.com/saudi-telco-asks-researcher-moxie-marlinspike-to-help-it-spy-on-residents/article/543558/|title=Saudi telco asks researcher Moxie Marlinspike to help it spy on residents|date=2013-05-13|work=SC Media US|access-date=2018-06-18|language=en}}</ref> Some of the company's software products were released under [[open-source license]]s after the acquisition.<ref name="mashable2"/> An independent group called [[Open Whisper Systems]] later picked up the development of this open-source software,<ref name="welcome" /> which led to the creation of the [[Signal Technology Foundation]].<ref name="signal-foundation"/><ref name="propublica"/>


==History==
==History==
Security researcher [[Moxie Marlinspike]] and roboticist Stuart Anderson co-founded Whisper Systems in 2010.<ref name="bloomberg1">{{cite web|url=http://investing.businessweek.com/research/stocks/private/snapshot.asp?privcapId=141104009|title=Company Overview of Whisper Systems Inc. |publisher=Bloomberg Businessweek |date= |accessdate=2014-03-04}}</ref><ref name="wired1">{{cite news|last=Garling |first=Caleb |url=http://www.wired.com/wiredenterprise/2011/12/twitter-open-sources-its-android-moxie/ |title=Twitter Open Sources Its Android Moxie &#124; Wired Enterprise |publisher=Wired.com |date= 2011-12-20|accessdate=2011-12-21}}</ref> In addition to launching [[TextSecure]] in May 2010, Whisper Systems produced [[RedPhone]], an application that provides encrypted voice calls.<ref name="forbes1">{{cite news|author=Andy Greenberg |url=http://www.forbes.com/sites/firewall/2010/05/25/android-app-aims-to-allow-wiretap-proof-cell-phone-calls/ |title=Android App Aims to Allow Wiretap-Proof Cell Phone Calls |publisher=Forbes |date=2010-05-25 |accessdate=2014-02-28}}</ref> They also developed a firewall and tools for encrypting other forms of data.<ref name="wired1"/><ref>{{cite web|url=http://www.techburrp.com/technology/secure-your-android-mobile-use-whisper-systems-free-security-app-whispercore/ |title=Secure your Android mobile – Use Whisper Systems free security app Whispercore « Technology updates by Techburrp |publisher=Techburrp.com |date= |accessdate=2011-12-21}}</ref>
Security researcher [[Moxie Marlinspike]] and roboticist Stuart Anderson co-founded Whisper Systems in 2010.<ref name="bloomberg1">{{cite web|url=http://investing.businessweek.com/research/stocks/private/snapshot.asp?privcapId=141104009|archive-url=https://archive.today/20140304095526/http://investing.businessweek.com/research/stocks/private/snapshot.asp?privcapId=141104009|url-status=dead|archive-date=March 4, 2014|title=Company Overview of Whisper Systems Inc. |publisher=Bloomberg Businessweek |access-date=2014-03-04}}</ref><ref name="wired1">{{cite news|last=Garling |first=Caleb |url=https://www.wired.com/wiredenterprise/2011/12/twitter-open-sources-its-android-moxie/ |title=Twitter Open Sources Its Android Moxie &#124; Wired Enterprise |publisher=Wired.com |date= 2011-12-20|access-date=2011-12-21}}</ref> The company produced [[Proprietary software|proprietary]] enterprise mobile security software. Among these were an encrypted texting program called [[TextSecure]] and an encrypted voice calling app called [[RedPhone]].<ref name="forbes1">{{cite news|author=Andy Greenberg |url=https://www.forbes.com/sites/firewall/2010/05/25/android-app-aims-to-allow-wiretap-proof-cell-phone-calls/ |title=Android App Aims to Allow Wiretap-Proof Cell Phone Calls |work=Forbes |date=2010-05-25 |access-date=2014-02-28}}</ref> They also developed a firewall and tools for encrypting other forms of data.<ref name="wired1"/><ref>{{cite web|url=http://www.techburrp.com/technology/secure-your-android-mobile-use-whisper-systems-free-security-app-whispercore/ |title=Secure your Android mobile – Use Whisper Systems free security app Whispercore « Technology updates by Techburrp |publisher=Techburrp.com |access-date=2011-12-21}}</ref>


⚫
On November 28, 2011, Whisper Systems announced that it had been acquired by [[Twitter]]. The financial terms of the deal were not disclosed by either company.<ref name="venturebeat1" /> The acquisition was done "primarily so that Mr. Marlinspike could help the then-startup improve its security".<ref name="Yadron-2015">{{cite news|last1=Yadron|first1=Danny|title=Moxie Marlinspike: The Coder Who Encrypted Your Texts|url=https://www.wsj.com/articles/moxie-marlinspike-the-coder-who-encrypted-your-texts-1436486274|access-date=10 July 2015|work=The Wall Street Journal|date=9 July 2015}}</ref> Shortly after the acquisition, Whisper Systems' RedPhone service was made unavailable.<ref name="forbes2" /> Some criticized the removal, arguing that the software was "specifically targeted [to help] people under repressive regimes" and that it left people like the Egyptians in "a dangerous position" during the events of the [[2011 Egyptian revolution]].<ref name="wired2" />
===Acquisition===
⚫
On November 28, 2011, Whisper Systems announced that it had been acquired by [[Twitter]]. The financial terms of the deal were not disclosed by either company.<ref name="venturebeat1" /> Shortly after the acquisition, Whisper Systems' RedPhone service was made unavailable.<ref name="forbes2" /> Some criticized the removal, arguing that the software was "specifically targeted [to help] people under repressive regimes" and that it left people like the Egyptians in "a dangerous position" during the events of the [[2011 Egyptian revolution]].<ref name="wired2" />


Twitter released TextSecure as [[free and open-source software]] under the [[GNU General Public License|GPLv3]] license in December 2011.<ref name="twitter1" /><ref name="whispersys2" /><ref name="wired1"/><ref name="mashable2" /> RedPhone was also released under the same license in July 2012.<ref name="whispersys3" /> These were subsequently adopted by the user community and the collaborative [[open source]] project for their continued development later named itself [[Open Whisper Systems]].<ref name="welcome" />
Twitter released TextSecure as [[free and open-source software]] under the [[GNU General Public License|GPLv3]] license in December 2011.<ref name="twitter1" /><ref name="whispersys2" /><ref name="wired1"/><ref name="mashable2" /> RedPhone was also released under the same license in July 2012.<ref name="whispersys3" />

Marlinspike later left Twitter and founded [[Open Whisper Systems]] as a collaborative Open Source project for the continued development of TextSecure and RedPhone.<ref name="wired3">{{cite web| url=https://www.wired.com/2014/07/free-encrypted-calling-finally-comes-to-the-iphone/ |title=Your iPhone Can Finally Make Free, Encrypted Calls |publisher= Wired |author= Andy Greenberg |date= 29 July 2014 |access-date= 18 January 2015}}</ref><ref name="welcome" /> Open Whisper Systems consisted of a large community of volunteer Open Source contributors, as well as a small team of dedicated grant-funded developers. In November 2015, Open Whisper Systems merged TextSecure with RedPhone and renamed it as [[Signal (messaging app)|Signal]].<ref name="just-signal">{{cite web|author=Marlinspike, Moxie|url=https://whispersystems.org/blog/just-signal/|title=Just Signal|date=2 November 2015|publisher=Open Whisper Systems|access-date=5 November 2015}}</ref> In 2018, Signal Messenger was incorporated as an LLC by Moxie Marlinspike and [[Brian Acton]] and then rolled under the independent non-profit [[Signal Technology Foundation]]. Today, the Signal app is developed by Signal Messenger LLC, which is funded by the Signal Foundation.<ref name="signal-foundation">{{cite web|last1=Marlinspike|first1=Moxie|last2=Acton|first2=Brian|title=Signal Foundation|url=https://signal.org/blog/signal-foundation/|website=Signal.org|access-date=21 February 2018|date=21 February 2018|archive-date=16 February 2020|archive-url=https://web.archive.org/web/20200216021349/https://signal.org/blog/signal-foundation/|url-status=live}}</ref><ref name="propublica">{{cite web |title=Signal Technology Foundation |url=https://projects.propublica.org/nonprofits/organizations/824506840 |website=Nonprofit Explorer |date=9 May 2013 |publisher=Pro Publica Inc. |access-date=7 June 2019 |archive-date=9 January 2021 |archive-url=https://web.archive.org/web/20210109161310/https://projects.propublica.org/nonprofits/organizations/824506840 |url-status=live }}</ref> The foundation has stated publicly that they are not tied to any major technology companies and "can never be acquired by one either."<ref>{{Cite tweet |author=Signal Technology Foundation |author-link=Signal Technology Foundation |user=signalapp |number=1347524902396456961 |date=8 January 2021 |title=We are a 501c3 nonprofit. We're not tied to any major tech companies, and we can never be acquired by one either. Development is supported by grants and donations from Signal users. |access-date= 24 January 2021}}</ref>

==Products==
Whisper Systems' products were all made for Android and included:<ref>{{cite web|title=Mobile Security For Android|archive-url=https://web.archive.org/web/20120104060347/http://whispersys.com/index.html|url=http://whispersys.com/index.html|publisher=Whisper Systems|access-date=9 December 2015|archive-date=4 January 2012}}</ref>
* '''TextSecure''': An app that allowed the user to exchange end-to-end encrypted [[SMS]] messages with other TextSecure users.
* '''RedPhone''': An app that allowed the user to make end-to-end encrypted [[VoIP]] calls to other RedPhone users.
* '''Flashback''': An app that allowed the user to store encrypted backups of their device in the [[Cloud computing|cloud]].<ref>{{cite web|title=Encrypted backups for Android|url=http://www.whispersys.com/flashback.html|publisher=Whisper Systems|access-date=9 December 2015|archive-url=https://web.archive.org/web/20111229054311/http://www.whispersys.com/flashback.html|archive-date=29 December 2011}}</ref>
* '''WhisperCore''': An app that integrated with the underlying Android OS to protect everything the user kept on their phone. The initial beta featured full disk encryption, network security tools, encrypted backup, selective permissions, and basic platform management tools for [[Nexus S]] and [[Nexus One]] phones.
* '''WhisperMonitor''': An app that worked with WhisperCore to provide a software firewall capable of dynamic [[egress filtering]] and real-time connection monitoring, giving the user control over where their data was going and what their apps were doing.<ref>{{cite web|title=Network security for Android|url=http://www.whispersys.com/whispermonitor.html|publisher=Whisper Systems|access-date=9 December 2015|archive-url=https://web.archive.org/web/20120115193420/http://www.whispersys.com/whispermonitor.html|archive-date=15 January 2012}}</ref>


==See also==
==See also==
Line 26: Line 41:
{{Reflist|refs=
{{Reflist|refs=


<ref name="mashable1">{{cite news |url=http://mashable.com/2011/12/20/textsecure-open-source/ |author= Pete Pachal |title=Twitter Takes TextSecure, Texting App for Dissidents, Open Source |publisher=Mashable |date= 2011-12-20 |accessdate=2014-03-01}}</ref>
<ref name="mashable2">{{cite news |url=http://mashable.com/2011/12/20/textsecure-open-source/ |author= Pete Pachal |title=Twitter Takes TextSecure, Texting App for Dissidents, Open Source |publisher=Mashable |date= 2011-12-20 |access-date=2014-03-01}}</ref>


<ref name="venturebeat1">{{cite web|date=November 28, 2011 | author=Tom Cheredar |url=http://venturebeat.com/2011/11/28/twitter-buys-whisper-systems/ |title=Twitter acquires Android security startup Whisper Systems |publisher=VentureBeat |accessdate=2011-12-21}}</ref>
<ref name="venturebeat1">{{cite web|date=November 28, 2011 | author=Tom Cheredar |url=https://venturebeat.com/2011/11/28/twitter-buys-whisper-systems/ |title=Twitter acquires Android security startup Whisper Systems |publisher=VentureBeat |access-date=2011-12-21}}</ref>


<ref name="forbes2">{{cite news|author=Andy Greenberg |url=http://www.forbes.com/sites/andygreenberg/2011/11/28/twitter-acquires-moxie-marlinspikes-encryption-startup-whisper-systems/ |title=Twitter Acquires Moxie Marlinspike's Encryption Startup Whisper Systems |publisher=Forbes |date=2011-11-28 |accessdate=2011-12-21}}</ref>
<ref name="forbes2">{{cite news|author=Andy Greenberg |url=https://www.forbes.com/sites/andygreenberg/2011/11/28/twitter-acquires-moxie-marlinspikes-encryption-startup-whisper-systems/ |title=Twitter Acquires Moxie Marlinspike's Encryption Startup Whisper Systems |work=Forbes |date=2011-11-28 |access-date=2011-12-21}}</ref>


<ref name="wired2">{{cite news|last=Garling |first=Caleb |url=http://www.wired.com/wiredenterprise/2011/11/twitter-buys-moxie/ |title=Twitter Buys Some Middle East Moxie &#124; Wired Enterprise |publisher=Wired.com |date= 2011-11-28|accessdate=2011-12-21}}</ref>
<ref name="wired2">{{cite news|last=Garling |first=Caleb |url=https://www.wired.com/wiredenterprise/2011/11/twitter-buys-moxie/ |title=Twitter Buys Some Middle East Moxie &#124; Wired Enterprise |publisher=Wired.com |date= 2011-11-28|access-date=2011-12-21}}</ref>


<ref name="twitter1">{{cite web |url=https://blog.twitter.com/2011/whispers-are-true |title= The Whispers Are True |archiveurl= https://web.archive.org/web/20141024130437/https://blog.twitter.com/2011/whispers-are-true |archivedate= 24 October 2014 |date= 20 December 2011 |website=The Twitter Developer Blog |author=Chris Aniszczyk |publisher=Twitter |accessdate=22 January 2015}}</ref>
<ref name="twitter1">{{cite web |url=https://blog.twitter.com/2011/whispers-are-true |title= The Whispers Are True |archive-url= https://web.archive.org/web/20141024130437/https://blog.twitter.com/2011/whispers-are-true |archive-date= 24 October 2014 |date= 20 December 2011 |website=The Twitter Developer Blog |author=Chris Aniszczyk |publisher=Twitter |access-date=22 January 2015}}</ref>


<ref name="whispersys2">{{cite web |url=http://www.whispersys.com/updates.html |title= TextSecure is now Open Source! |archiveurl= https://web.archive.org/web/20120106024504/http://www.whispersys.com/updates.html |archivedate= 6 January 2012 |date= 20 December 2011 |publisher=Whisper Systems |accessdate=22 January 2015}}</ref>
<ref name="whispersys2">{{cite web |url=http://www.whispersys.com/updates.html |title= TextSecure is now Open Source! |archive-url= https://web.archive.org/web/20120106024504/http://www.whispersys.com/updates.html |archive-date= 6 January 2012 |date= 20 December 2011 |publisher=Whisper Systems |access-date=22 January 2015}}</ref>


<ref name="whispersys3">{{cite web |url=http://www.whispersys.com/updates.html |title= RedPhone is now Open Source! |archiveurl= https://web.archive.org/web/20120731143138/http://www.whispersys.com/updates.html |archivedate= 31 July 2012 |date= 18 July 2012 |publisher=Whisper Systems |accessdate=22 January 2015}}</ref>
<ref name="whispersys3">{{cite web |url=http://www.whispersys.com/updates.html |title= RedPhone is now Open Source! |archive-url= https://web.archive.org/web/20120731143138/http://www.whispersys.com/updates.html |archive-date= 31 July 2012 |date= 18 July 2012 |publisher=Whisper Systems |access-date=22 January 2015}}</ref>


<ref name="mashable2">{{cite news |url=http://mashable.com/2011/12/20/textsecure-open-source/ |author= Pete Pachal |title=Twitter Takes TextSecure, Texting App for Dissidents, Open Source |publisher=Mashable |date= 2011-12-20 |accessdate=2014-03-01}}</ref>
<ref name="welcome">{{cite news |url=https://whispersystems.org/blog/welcome/ |title=A New Home |publisher=Open Whisper Systems |date= 2013-01-21 |access-date=2014-03-01}}</ref>
}}


==External links==
<ref name="welcome">{{cite news |url=https://whispersystems.org/blog/welcome/ |title=A New Home |publisher=Open Whisper Systems |date= 2013-01-21 |accessdate=2014-03-01}}</ref>
* {{webarchive |url=https://web.archive.org/web/20130117185856/http://www.whispersys.com/ |date=17 January 2013 |title=Whisper Systems }}


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[[Category:Mobile software]]
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[[Category:Software companies established in 2010]]
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[[Category:Cryptographic software]]
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Latest revision as of 06:46, 13 September 2024

Not to be confused with Open Whisper Systems, the open-source software group that started Signal, or Whisper, a product of WhisperText LLC.
Whisper Systems
IndustryEncryption software, Mobile software, Mobile security
Founded2010
Founders
DefunctNovember 28, 2011 (2011-11-28)
FateAcquired by Twitter
Headquarters
San Francisco, California
,
U.S.
Websitewww.whispersys.com
See Archived 17 January 2013 at the Wayback Machine

Whisper Systems was an American enterprise mobile security company that was co-founded by security researcher Moxie Marlinspike and roboticist Stuart Anderson in 2010.[1] The company was acquired by Twitter in November 2011.[2][3][4] Some of the company's software products were released under open-source licenses after the acquisition.[5] An independent group called Open Whisper Systems later picked up the development of this open-source software,[6] which led to the creation of the Signal Technology Foundation.[7][8]

History

[edit]

Security researcher Moxie Marlinspike and roboticist Stuart Anderson co-founded Whisper Systems in 2010.[9][1] The company produced proprietary enterprise mobile security software. Among these were an encrypted texting program called TextSecure and an encrypted voice calling app called RedPhone.[10] They also developed a firewall and tools for encrypting other forms of data.[1][11]

On November 28, 2011, Whisper Systems announced that it had been acquired by Twitter. The financial terms of the deal were not disclosed by either company.[2] The acquisition was done "primarily so that Mr. Marlinspike could help the then-startup improve its security".[12] Shortly after the acquisition, Whisper Systems' RedPhone service was made unavailable.[13] Some criticized the removal, arguing that the software was "specifically targeted [to help] people under repressive regimes" and that it left people like the Egyptians in "a dangerous position" during the events of the 2011 Egyptian revolution.[14]

Twitter released TextSecure as free and open-source software under the GPLv3 license in December 2011.[15][16][1][5] RedPhone was also released under the same license in July 2012.[17]

Marlinspike later left Twitter and founded Open Whisper Systems as a collaborative Open Source project for the continued development of TextSecure and RedPhone.[18][6] Open Whisper Systems consisted of a large community of volunteer Open Source contributors, as well as a small team of dedicated grant-funded developers. In November 2015, Open Whisper Systems merged TextSecure with RedPhone and renamed it as Signal.[19] In 2018, Signal Messenger was incorporated as an LLC by Moxie Marlinspike and Brian Acton and then rolled under the independent non-profit Signal Technology Foundation. Today, the Signal app is developed by Signal Messenger LLC, which is funded by the Signal Foundation.[7][8] The foundation has stated publicly that they are not tied to any major technology companies and "can never be acquired by one either."[20]

Products

[edit]

Whisper Systems' products were all made for Android and included:[21]

  • TextSecure: An app that allowed the user to exchange end-to-end encrypted SMS messages with other TextSecure users.
  • RedPhone: An app that allowed the user to make end-to-end encrypted VoIP calls to other RedPhone users.
  • Flashback: An app that allowed the user to store encrypted backups of their device in the cloud.[22]
  • WhisperCore: An app that integrated with the underlying Android OS to protect everything the user kept on their phone. The initial beta featured full disk encryption, network security tools, encrypted backup, selective permissions, and basic platform management tools for Nexus S and Nexus One phones.
  • WhisperMonitor: An app that worked with WhisperCore to provide a software firewall capable of dynamic egress filtering and real-time connection monitoring, giving the user control over where their data was going and what their apps were doing.[23]

See also

[edit]

References

[edit]
  1. ^ a b c d Garling, Caleb (2011-12-20). "Twitter Open Sources Its Android Moxie | Wired Enterprise". Wired.com. Retrieved 2011-12-21.
  2. ^ a b Tom Cheredar (November 28, 2011). "Twitter acquires Android security startup Whisper Systems". VentureBeat. Retrieved 2011-12-21.
  3. ^ Brad McCarty (28 November 2011). "Twitter acquires mobile data security gurus Whisper Systems". Retrieved 16 January 2015.
  4. ^ "Saudi telco asks researcher Moxie Marlinspike to help it spy on residents". SC Media US. 2013-05-13. Retrieved 2018-06-18.
  5. ^ a b Pete Pachal (2011-12-20). "Twitter Takes TextSecure, Texting App for Dissidents, Open Source". Mashable. Retrieved 2014-03-01.
  6. ^ a b "A New Home". Open Whisper Systems. 2013-01-21. Retrieved 2014-03-01.
  7. ^ a b Marlinspike, Moxie; Acton, Brian (21 February 2018). "Signal Foundation". Signal.org. Archived from the original on 16 February 2020. Retrieved 21 February 2018.
  8. ^ a b "Signal Technology Foundation". Nonprofit Explorer. Pro Publica Inc. 9 May 2013. Archived from the original on 9 January 2021. Retrieved 7 June 2019.
  9. ^ "Company Overview of Whisper Systems Inc". Bloomberg Businessweek. Archived from the original on March 4, 2014. Retrieved 2014-03-04.
  10. ^ Andy Greenberg (2010-05-25). "Android App Aims to Allow Wiretap-Proof Cell Phone Calls". Forbes. Retrieved 2014-02-28.
  11. ^ "Secure your Android mobile – Use Whisper Systems free security app Whispercore « Technology updates by Techburrp". Techburrp.com. Retrieved 2011-12-21.
  12. ^ Yadron, Danny (9 July 2015). "Moxie Marlinspike: The Coder Who Encrypted Your Texts". The Wall Street Journal. Retrieved 10 July 2015.
  13. ^ Andy Greenberg (2011-11-28). "Twitter Acquires Moxie Marlinspike's Encryption Startup Whisper Systems". Forbes. Retrieved 2011-12-21.
  14. ^ Garling, Caleb (2011-11-28). "Twitter Buys Some Middle East Moxie | Wired Enterprise". Wired.com. Retrieved 2011-12-21.
  15. ^ Chris Aniszczyk (20 December 2011). "The Whispers Are True". The Twitter Developer Blog. Twitter. Archived from the original on 24 October 2014. Retrieved 22 January 2015.
  16. ^ "TextSecure is now Open Source!". Whisper Systems. 20 December 2011. Archived from the original on 6 January 2012. Retrieved 22 January 2015.
  17. ^ "RedPhone is now Open Source!". Whisper Systems. 18 July 2012. Archived from the original on 31 July 2012. Retrieved 22 January 2015.
  18. ^ Andy Greenberg (29 July 2014). "Your iPhone Can Finally Make Free, Encrypted Calls". Wired. Retrieved 18 January 2015.
  19. ^ Marlinspike, Moxie (2 November 2015). "Just Signal". Open Whisper Systems. Retrieved 5 November 2015.
  20. ^ Signal Technology Foundation [@signalapp] (8 January 2021). "We are a 501c3 nonprofit. We're not tied to any major tech companies, and we can never be acquired by one either. Development is supported by grants and donations from Signal users" (Tweet). Retrieved 24 January 2021 – via Twitter.
  21. ^ "Mobile Security For Android". Whisper Systems. Archived from the original on 4 January 2012. Retrieved 9 December 2015.
  22. ^ "Encrypted backups for Android". Whisper Systems. Archived from the original on 29 December 2011. Retrieved 9 December 2015.
  23. ^ "Network security for Android". Whisper Systems. Archived from the original on 15 January 2012. Retrieved 9 December 2015.
[edit]
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