🤣🤣🤣😂
Bruv, before Signal launched they posted an entire whitepaper detailing their protocol, the working mechanisms of the system, and source code. So to reply to your 3 points:
- No, this is stupid and easily verified by watching network traffic from any device. Signal is secretly sending plaintext messages anywhere.
- No, it’s not impossible to tell this at all. That’s what source code is. The executable code. Not only have NUMEROUS security audits been done on Signal by everyone from Academia, to for-profit security researchers and governments, you can easily verify that what you’re running on your phone is the same source code as what is published publicly because the fingerprint hashes for builds are also published. This means the same fingerprint you’d get building it yourself from source should also be the same as what is publicly published.
- See my point above, but also when two users exchange keys on Signal (or in any other cryptographic sense), these keys are constantly verified. If changed, the session becomes invalid. Verifying these keys between two users is a feature of Signal, but moreover, the basics of cryptography functioning can, and have been proven, during the independent audits of Signal. Go read any of the numerous papers dating back to 2016.
If you don’t understand how any of this works, it’s just best not to comment.
pressanykeynow@lemmy.world 4 hours ago
What if the malicious actor is not Signal but Google or the hardware manufacturer?
Can we check that the encryption key generated by the device is not stored somewhere on the device? Same for the OS.
Can we check that the app running in memory is the same that is available for reproducible build checks?
Can we check that your and my apps at the moment are the same as the one security researchers tested?
just_another_person@lemmy.world 4 hours ago
The clients (apps) enforce key symmetry for your own keys, server identity, and the exchanged with the other person part of a conversation. Constantly. There is no way to MITM that.
The clients are open source, and audited regularly, and yes, builds are binary reproduceable and fingerprinted on release.
That’s not to say someone can’t build a malicious copy that does dumb stuff and put it in your phone to replace the other copy, but the server would catch and reject it if it’s fingerprints don’t match the previously known good copy, or a public version.
Now you’re just coming up with weird things to justify the paranoia. None of this has anything to do with Signal itself, which is as secure as it gets.
pressanykeynow@lemmy.world 4 hours ago
Didn’t I say that at the start of my questions? What’s your point?
If I understand you correctly, you mean that Signal app checks itself and sends the result to the server that can then deny access to it? Is that what Signal does and what makes it difficult to spoof this fingerprint?
I don’t think you answered any of my questions though since they weren’t about Signal.
I’m just asking questions about security I don’t know answers to, I’m not stating that’s how things are.