Unverified50% confidenceFactExact time
The Signal protocol has begun integrating the post-quantum key encapsulation mechanism PQXDH in preparation for future quantum threats
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
9/7/2026
First Seen
Valid until: 12/6/2026
Sources
Related Entities
Related Claims
UnverifiedHybrid encryption mode runs both classical and post-quantum algorithms simultaneously, ensuring that even if the post-quantum algorithm has unknown weaknesses, the system's security remains at least equivalent to that of the classical algorithm.62% similarUnverifiedOnce a practical quantum computer capable of running Shor's algorithm emerges, the existing public-key cryptography infrastructure will be completely broken.61% similarUnverifiedThe Signal protocol combines elliptic curve Diffie-Hellman key exchange (ECDH), the Double Ratchet algorithm, and pre-key mechanisms to ensure forward secrecy.61% similarUnverifiedThe Signal protocol involves the Double Ratchet algorithm and X3DH key agreement, achieving forward secrecy, and has been adopted by WhatsApp and Signal.59% similar
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