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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

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(#2s7hrha) @eapl.me Yeah this is true. Previously RSA and AES were more common. These days Salsa and Chacha and Curve are fairly prevalent. For …
@eapl.me @eapl.me Yeah this is true. Previously RSA and AES were more common. These days Salsa and Chacha and Curve are fairly prevalent. For example all the Wireguard stuff uses Curve25519 / Ed25519 crypto. Signal uses very similar crypto too, but with some very nice double ratcheting 3DH. ⌘ Read more

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In-reply-to » Holy moly, this is a fantastic 37C3 talk about security researchers getting attacked and they reverse-engineer and fully disclose the entire – very advanced – attack. Operation Triangulation: What You Get When Attack iPhones of Researchers Very impressive!

@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.

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In-reply-to » Holy moly, this is a fantastic 37C3 talk about security researchers getting attacked and they reverse-engineer and fully disclose the entire – very advanced – attack. Operation Triangulation: What You Get When Attack iPhones of Researchers Very impressive!

@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.

⤋ Read More