IBM researchers are collaborating with the developers of Signal and Threema to design cryptographic systems capable of resisting future quantum attacks. The partnership aims to adapt messaging protocols and encryption schemes to protect against “harvest now, decrypt later” threats, where adversaries store encrypted data today to crack it once quantum machines become powerful enough. This initiative focuses on transitioning from classical elliptic-curve cryptography to post-quantum cryptography (PQC) standards published by NIST in 2024. The collaboration with Signal involves a redesign of group messaging protocols to address specific metadata vulnerabilities. While Signal updated its core protocol with the Sparse Post-Quantum Ratchet (SPQR) […]