Even Mark Uses Signal...So Why Don't We?

Sources:
https://www.foxbusiness.com/technology/mark-zuckerberg-caught-using-signal-secure-chat-app-main-competitor-of-facebook-owned-whatsapp-report

https://www.businesstoday.in/latest/world/story/facebook-data-breach-mark-zuckerberg-uses-signal-phone-number-leaked-online-292774-2021-04-06

https://www.npr.org/2021/04/09/986005820/after-data-breach-exposes-530-million-facebook-says-it-will-not-notify-users

https://mashable.com/article/zuckerberg-on-signal

https://www.reddit.com/r/technews/comments/mmsfv5/mark_zuckerberg_caught_using_signal_secure_chat/

https://www.theguardian.com/technology/2018/apr/30/jan-koum-whatsapp-co-founder-quits-facebook

https://fortune.com/2019/03/14/whatsapp-facebook/

https://increment.com/security/story-of-signal/

https://en.wikipedia.org/wiki/Signal_Foundation

https://en.wikipedia.org/wiki/Moxie_Marlinspike

https://en.wikipedia.org/wiki/Whisper_Systems

https://web.archive.org/web/20131214065226/http://www.scmagazine.com.au/Tools/Print.aspx?CIID=264885

https://www.blackhat.com/presentations/bh-dc-09/Marlinspike/BlackHat-DC-09-Marlinspike-Defeating-SSL.pdf

https://www.firstpost.com/tech/news-analysis/after-praising-moxie-marlinspike-for-signal-elon-musk-and-twitter-to-partner-with-signal-for-encrypted-dms-11679901.html

https://www.forbes.com/sites/andygreenberg/2011/11/28/twitter-acquires-moxie-marlinspikes-encryption-startup-whisper-systems/?sh=62d0a04130b9

https://web.archive.org/web/20120106024504/http://www.whispersys.com/updates.html

https://web.archive.org/web/20120731143138/http://www.whispersys.com/updates.html

https://techcrunch.com/2014/11/18/end-to-end-for-everyone/

https://www.washingtonpost.com/business/technology/2014/09/17/2612af58-3ed2-11e4-b03f-de718edeb92f_story.html

https://signal.org/blog/allo/

https://signal.org/blog/facebook-messenger/

https://signal.org/blog/skype-partnership/

https://www.forbes.com/sites/parmyolson/2018/09/26/exclusive-whatsapp-cofounder-brian-acton-gives-the-inside-story-on-deletefacebook-and-why-he-left-850-million-behind/?sh=4e9ad3df3f20

https://www.nytimes.com/2018/04/04/us/politics/cambridge-analytica-scandal-fallout.html

https://www.theverge.com/2018/3/20/17145200/brian-acton-delete-facebook-whatsapp

https://www.wired.com/story/signal-foundation-whatsapp-brian-acton/

https://www.businessofapps.com/data/signal-statistics/

https://www.indiatoday.in/technology/news/story/how-secure-is-signal-it-s-good-enough-for-edward-snowden-so-good-enough-for-you-1757596-2021-01-10

https://www.cnbc.com/2021/01/08/elon-musk-boosts-signal-app-signal-advance-stock-jumps-1100percent.html

https://www.statista.com/statistics/1306022/whatsapp-global-unique-users/

https://www.cnet.com/tech/services-and-software/signal-whatsapp-and-telegram-heres-which-secure-messaging-app-you-should-use/