Developers urged to start post-quantum cryptography migration now, as NIST finalizes PQC standards

NIST has finalized its first post-quantum cryptography standards, which replace classical public-key algorithms with lattice-based and hash-based alternatives. The guide argues that migrating security systems across APIs, databases, and distributed services takes years, so waiting for quantum computers capable of breaking RSA and ECC would leave too little time. It recommends that developers first inventory all asymmetric cryptography in their stack, including TLS endpoints, encrypted data at rest, authentication tokens, and code signing. A hybrid approach that pairs classical key exchange with ML-KEM is suggested to preserve compatibility while guarding against harvest-now, decrypt-later attacks. Developers are also advised to plan for larger key and signature sizes and to build crypto-agile abstraction layers.