Researchers publish post-quantum upgrade to the Signal protocol

guest · Sep 7, 2022

Help Net Security - September 7, 2022

PQShield published a white paper that lays out the quantum threat to secure end-to-end messaging and explains how post-quantum cryptography (PQC) can be added to the Signal secure messaging protocol to protect it from quantum attacks.

The company is offering to license its end-to-end encrypted messaging IP to the Signal Foundation pro bono – if/when they plan to upgrade their system – to support the non-profit behind the free encrypted messaging app, Signal, in its mission to make secure communication accessible to everyone.
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Adding post-quantum cryptography to the Signal protocol
Thomas Prest, Lead Cryptography Researcher at PQShield said:

“The Signal protocol is widely regarded as the gold standard for secure instant messaging. However, the cryptographic problem underlying its security is known to be easily solvable by quantum computers, and any adversary harvesting current communications would easily be able to decrypt exchanged messages in the future. That’s why we are publishing our full analysis, research and solutions for how to protect secure instant messaging from the quantum threat. The stakes are just too high not to do so.”
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Press Release: PQShield publishes post-quantum upgrade to the Signal Protocol and offers it pro bono to the Signal Foundation

Quantum computers pose a fundamental threat to the end-to-end encryption used in secure messaging apps

A new white paper from PQShield lays out the security issues, and explains how post-quantum cryptography can protect secure messaging protocols

PQShield is principally backed by Addition, Crane Venture Partners, Oxford Science Enterprises (formerly OSI), Kindred Capital, and InnovateUK. Its latest white papers are available to read here.
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Researchers publish post-quantum upgrade to the Signal protocol

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Researchers publish post-quantum upgrade to the Signal protocol

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