Glossary
What is a forward secrecy?
Forward secrecy means that if an attacker steals a key today, they still cannot decrypt your past messages, because those messages used keys that have already been deleted.
Systems with forward secrecy give each message a fresh key and destroy old keys after use. So a single compromised key unlocks, at most, one message - not the whole conversation history.
PrivaMesh gets forward secrecy from the Double Ratchet algorithm. A real consequence: your seed phrase restores your funds and identity, but not your chat history, because the old message keys no longer exist. That is the guarantee working as designed.