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New Messaging Protocol Developed to Address Quantum Threats

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🗡️ New Hybrid-Secure Messaging Protocol Developed to Combat Quantum Threats. Researchers have introduced the “Triple Ratchet” (TR) protocol, enhancing secure messaging apps like Signal against potential “Harvest Now, Decrypt Later” attacks. This new protocol significantly reduces communication complexity compared to the existing PQ3 method, which suffers from high overhead due to the Kyber scheme. TR employs erasure codes for balanced communication and introduces a novel variant of Kyber, named Katana, which decreases the size of ciphertext and public keys by over 37%. This advancement addresses a critical security flaw in previous lattice-based PQ-ratchets and is currently under evaluation by the Signal team for future implementation.

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