Mastodawn

#signal To add post‑quantum security, Signal introduced the Sparse Post‑Quantum Ratchet #SPQR , which runs alongside the existing #DoubleRatchet

https://signal.org/blog/spqr/

The protocol now effectively combines three components: the symmetric ratchet, the classical DH ratchet, and the new post‑quantum ratchet (SPQR).

https://pqshield.com/diving-into-signals-new-pq-protocol/

#TrippleRatchet

https://blog.quarkslab.com/triple-threat-signals-ratchet-goes-post-quantum.html

Signal Protocol and Post-Quantum Ratchets

We are excited to announce a significant advancement in the security of the Signal Protocol: the introduction of the Sparse Post Quantum Ratchet (SPQR). This new ratchet enhances the Signal Protocol’s resilience against future quantum computing threats while maintaining our existing security guar...

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