ignirtoq
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- Comment on Why Signal’s post-quantum makeover is an amazing engineering achievement 2 days ago:
While a TLS uses the same key throughout a session, keys within a Signal session constantly evolve.
What are we defining as a "session" for Signal? The vast majority of TLS sessions exist for the duration of pulling down a web page. Dynamically interact with that page? New HTTP request backed by a new TLS session. Sure, there are exceptions like WebSockets, but by and large TLS sessions are often short.
Is a Signal session the duration of sending a single message? An entire conversation? The entire time you have someone in your address book? It doesn't seem like an apples-to-apples comparison.