Hash-Based Cryptography

Post-quantum category relying on hash functions (SHA-256, SHA-3). Key schemes: XMSS, LMS, SPHINCS+ (SLH-DSA FIPS 205). Security based on minimal assumptions - conservative quantum-resistant choice providing cryptographic diversity.

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Hash-based provides independent foundation ensuring quantum resistance survives lattice cryptanalysis breakthroughs.

High-security government adopt hash signatures. Long-term signatures use SPHINCS+. Critical infrastructure implements hash backup.