The Most Backdoor-Looking Bug I’ve Ever Seen

1 · Filippo Valsorda · Jan. 9, 2021, 11 p.m.
This is the story of a bug that was discovered and fixed in Telegram's self-rolled cryptographic protocol about seven years ago. The bug didn't get any press, and no one seems to know about it, probably because it was only published in Russian. To this day,...