[Zak]

The Signal client app is open source; it's probably not reasonable to describe a modified version as "cracked". Signal does discourage the use of modified clients for security reasons, but does not actively block most of them.

[namdnay]

You’re right for Signal! Their WhatsApp client, however… that’s definitely “cracked”

[immibis]

Which is great. We need these proprietary protocols to be more open, and cracking them is one way to do that.