ProcessOne: On Signal Protocol and Post-Quantum Ratchets

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Signal improved its protocol to prepare encrypted messaging for the quantum era.

They call the improvement “Triple Ratchet” (or SPQR = Signal Post-Quantum Ratchet).

[Signal Protocol and Post-Quantum Ratchets\
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We are excited to announce a significant advancement in the security … ⌘ Read more

Denmark’s Government Aims To Ban Access To Social Media For Children Under 15
An anonymous reader quotes a report from the Associated Press: Denmark’s government on Friday announced an agreement to ban access to social media for anyone under 15, ratcheting up pressure on Big Tech platforms as concerns grow that kids are getting too swept up in a digitized world of harmful content and commercial int … ⌘ Read more

Signal Protocol and Post-Quantum Ratchets
Article URL: https://signal.org/blog/spqr/

Comments URL: https://news.ycombinator.com/item?id=45451527

Points: 633

# Comments: 281 ⌘ Read more

A formal analysis of Apple’s iMessage PQ3 protocol
We present the formal verification of Apple’s iMessage PQ3, a highly performant, device-to-device messaging protocol offering strong security guarantees even against an adversary with quantum computing capabilities. PQ3 leverages Apple’s identity services together with a custom, post-quantum secure initialization phase and afterwards it employs a double ratchet construction in the style of Signal, extended to provide post-quantum, … ⌘ Read more

@lyse@lyse.isobeef.org I have read the white papers for MLS before. I have put a lot of thought on how to do it with salty/ratchet. Its a very good tech for ensuring multiple devices can be joined to an encrypted chat. But it is bloody complicated to implement.

And to add close integration with salty/ratchet for realtime private chat

Ratchet CLI now supports salty or ratchet comms!

@prologic@twtxt.net #ratchet #lives