Wednesday, December 23, 2020 [Tweets] [Favorites]

Cellebrite and Signal

Bruce Schneier:

Cellebrite announced that it can break Signal. (Note that the company has heavily edited its blog post, but the original — with lots of technical details — was saved by the Wayback Machine.)

Moxie Marlinspike (Hacker News):

Last week, Cellebrite posted a pretty embarrassing (for them) technical article to their blog documenting the “advanced techniques” they use to parse Signal on an Android device they physically have with the screen unlocked.

This is a situation where someone is holding an unlocked phone in their hands and could simply open the app to look at the messages in it. Their post was about doing the same thing programmatically (which is equally simple), but they wrote an entire article about the “challenges” they overcame, and concluded that “…it required extensive research on many different fronts to create new capabilities from scratch.”

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