#isogeny-cryptography 1 post tagged isogeny-cryptography. How the NIST Finalists Broke: Rainbow in a Weekend, SIKE in an Afternoon, and the Graveyard of Post-Quantum Candidates Jul 19, 2026 In 2022 two vetted NIST post-quantum candidates fell to classical math -- Rainbow in a weekend, SIKE in ten minutes. That is the process working, not failing.