That post seems to be missing.

sexy_peach 16 points 3 years ago

This is the encryption that they developed. Whatsapp and OMEMO (XMPP) use it as well. It has forward secrecy because if an attacker has the key for a message they can't calculate the key for the key for the next message etc.

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path: 0 3031527, hotness: undefined, score: 16, children: 7

voxel 3 points 3 years ago

@sexy_peach So when I understood it right (just skimmed the text), the encryption keys changes per message?

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path: 0 3031527 3031627, hotness: undefined, score: 3, children: 6

sexy_peach 5 points 3 years ago

essentially, yes. There are two levels of encryption keys and they "ratchet" along (change). Only the lower level is used to encrypt the text so it's much harder to figure out the other one.

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path: 0 3031527 3031627 3031628, hotness: undefined, score: 5, children: 3

voxel 1 point 3 years ago

@sexy_peach Thank you very much! Just now wondering, handle WA this differently? Since Ig we all know this message which appears when the "keys" ig, changed

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path: 0 3031527 3031627 3031628 3031688, hotness: undefined, score: 1, children: 2

sexy_peach 2 points 3 years ago

Since Ig we all know this message which appears when the “keys” ig, changed

I don't know if I fully understand you here.

To my understanding whatsapp does it like this too. The key changing must be the high level key, since the message means that it's an unknown key (thus not yet trusted). From new install or new device.

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path: 0 3031527 3031627 3031628 3031688 3031689, hotness: undefined, score: 2, children: 1

voxel 1 point 3 years ago

@sexy_peach Okay, got it, ig.

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path: 0 3031527 3031627 3031628 3031688 3031689 3033202, hotness: undefined, score: 1, children: 0

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