AI BriefingA Developer's Guide to Post-Quantum Cryptography (PQC-ML-KEM)
Key point
This article outlines the principles and application strategies of ML-KEM, the NIST PQC standard designed to counter quantum computing threats.
Details
Existing public-key cryptographic systems such as RSA and ECDH, which are central to current web communications, are vulnerable to being easily broken by the Shor algorithm on quantum computers. In response, NIST finalized ML-KEM (FIPS 203), ML-DSA, and SLH-DSA as official standards in August 2024.
ML-KEM is based on mathematical hard problems in Lattice cryptography, specifically the LWE (Learning With Errors) problem. Solving systems of linear equations with added errors in high-dimensional lattices is extremely difficult for both classical and quantum computers, thereby ensuring post-quantum security.
- FIPS 203 (ML-KEM): For key encapsulation (key exchange), lattice-based
- FIPS 204 (ML-DSA): For digital signatures, lattice-based
- FIPS 205 (SLH-DSA): For digital signatures, hash-based
Developers must consider these PQC standards when building future security infrastructure to defend against 'Harvest Now, Decrypt Later' attacks.
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