IBM is collaborating with Signal and Threema to design an encrypted messaging system that can withstand quantum attacks.

CoinFeed reported on March 11 that, according to Decrypt, IBM researchers are collaborating with Signal and Threema to design a messaging system resistant to quantum attacks. Cryptography researcher Ethan Heilman points out that due to the possibility of "store-first, decrypt-later" attacks, encrypted messaging platforms may face greater near-term quantum risks than Bitcoin—attackers now intercept and store encrypted data, waiting to break it once quantum computers mature. Signal launched its PQXDH upgrade in 2023 to protect new sessions and will extend post-quantum protection to persistent messaging, calls, and media through an SPQR protocol upgrade in 2025. Threema is collaborating with IBM to explore integrating the NIST-standardized ML-KEM algorithm into its system.