NIST just advanced 9 candidates to Round 3 of its additional PQC digital signatures process. Four mathematical families. Two-year timeline. And a hard lesson from SIKE and Rainbow: cryptographic monoculture is a systemic risk.

My analysis on Security Boulevard:
https://securityboulevard.com/2026/05/nists-nine-the-pqc-signature-race-moves-to-round-three