Let me shamelessly post this again: https://blog.thijsalkema.de/blog/2014/04/02/breaking-half-of-the-telegram-contest/ https://blog.thijsalkema.de/blog/2014/04/

Let me shamelessly post this again: https://blog.thijsalkema.de/blog/2014/04/02/breaking-half-of-the-telegram-contest/ https://blog.thijsalkema.de/blog/2014/04/02/breaking-half-of... Even if you'd consider their protocol secure enough (which I don't), this third-party app was written by someone who thought rand48 was good enough for long-term crypto keys. I'd stay far, far away from this.