Cryptography

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cryptography (noun). The discipline concerned with communication security (eg, confidentiality of messages, integrity of messages, sender authentication, non-repudiation of messages, and many other related issues), regardless of the used medium such as pencil and paper or computers.

This community is for links about and discussion of cryptography specifically. For privacy technology more generally, use !privacy.

This community is explicitly not about cryptocurrency; see !crypto for that.

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Quantum Resistance and the Signal Protocol (signal.org)

submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]

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The article is about:

The Signal Protocol, a set of cryptographic specifications that provides end-to-end encryption for private communications. PQXDH, an upgrade to the Signal Protocol that adds a layer of protection against the threat of a future quantum computer breaking current encryption standards.
Quantum computing, a new type of computational system that can solve some complex problems faster than classical computers, such as the hidden subgroup problem that underlies many public key cryptosystems4.
Post-quantum cryptography, a new category of algorithms that resist quantum attacks, and how Signal has chosen CRYSTALS-Kyber as its post-quantum key encapsulation mechanism.
The implementation and deployment of PQXDH in Signal’s client applications and the open research areas for further quantum resistance.

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[–] [email protected] 0 points 1 year ago (1 children)

Signals encryption is solid. When Signal updates their encryption for quantum computers, I know it was well thought out and will be well researched over time.

[–] [email protected] 1 points 1 year ago

it actually had some issues: An Analysis of Signal's PQXDH