Earlier quoted context omitted.
https://restoreprivacy.com/telegram-sharing-user-data/ > the operators of the messenger app Telegram have released user data to the Federal Criminal Police Office (BKA) in several cases. According to SPIEGEL information, this was data from suspects in the areas of child abuse and terrorism. In the case of violations of other criminal offenses, it is still difficult for German investigators to obtain information from…
Signal built by the US government? Is there any more actual information on this claim?
Double Ratchet [1] is also used by WhatsApp (2B+ users) and IETF MLS [2] standard for E2EE group messaging.
[1] https://en.wikipedia.org/wiki/Double_Ratchet_Algorithm
[2] https://www.ietf.org/blog/mls-secure-and-usable-end-to-end-e...