NIST Finalizes IR 8547 Roadmap for Transition to Post-Quantum Cryptography Standards

Timeline Clarity: NIST IR 8547 deprecates quantum-vulnerable public-key algorithms after 2030 and disallows them after 2035.Priority Deadlines: Federal high-value assets and high-impact systems require PQC key establishment by December 31, 2030, and digital signatures by December 31, 2031.Algorithm Mapping: FIPS 203 ML-KEM, FIPS 204 ML-DSA, and FIPS 205 SLH-DSA form the primary replacement standards.The National Institute of Standards and Technology (NIST) published the final NIST IR 8547, Transition to Post-Quantum Cryptography Standards, on October 27, 2026. The report details the official approach and timelines for migrating from quantum-vulnerable public-key cryptography to the post-quantum standards released in August 2024. It supports implementation of Executive Order 14412 and OMB Memorandum M-26-15 for federal systems while providing guidance applicable to industry partners and standards organizations.The report identifies quantum-vulnerable algorithms in existing NIST standards, including RSA, Diffie-Hellman, ECDH, ECDSA, and EdDSA at approved security strengths of 112 bits or higher. These face deprecation after 2030, during which use remains possible subject to risk assessment by the data owner, and complete disallowance under NIST standards and guidelines after 2035.Replacements center on FIPS 203 Module-Lattice-Based Key-Encapsulation Mechanism (ML-KEM), with ML-KEM-768 recommended as the default parameter set, FIPS 204 Module-Lattice-Based Digital Signature Algorithm (ML-DSA), and FIPS 205 Stateless Hash-Based Signature Algorithm (SLH-DSA).Hybrid constructions combining classical and post-quantum methods remain available during the transition period via updated guidance in SP 800-56C and related publications.Dustin Moody, who leads the NIST PQC standardization project, noted different use cases may require varying migration durations.National Security Memorandum 10 established 2035 as the target for completing the federal migration to post-quantum cryptography. Executive Order 14412 accelerates this for high-value assets and high-impact systems, requiring PQC for key establishment by December 31, 2030, and for digital signatures by December 31, 2031. OMB Memorandum M-26-15 operationalizes the order, directing agencies to submit migration plans by October 22, 2026, and to prioritize systems holding data expected to remain sensitive in 2030. The report complements the NIST National Cybersecurity Center of Excellence (NCCoE) Migration to Post-Quantum Cryptography project, which develops practical demonstrations and tools for cryptographic inventory, risk prioritization, and agile implementation. Organizations outside the federal government, particularly those interacting with federal systems or managing long-lived sensitive data, face similar urgency due to the harvest-now-decrypt-later threat.NIST IR 8547 establishes the definitive technical roadmap and timelines for retiring quantum-vulnerable public-key cryptography in favor of standardized post-quantum alternatives.Find out more here.—Further articles, reports, and the latest quantum computing news may be found at The Qubit Report.UbiQD received a $200,000 New Mexico Quantum Technologies Award on October 28, 2026 to prototype a fiber-coupled single-photon light source.

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