Post-Quantum Cryptography Guide

NIST FIPS 203, 204, and 205 implementation in Shadow313 NEXUS.

ML-KEM-768 — NIST FIPS 203

Module-Lattice Key Encapsulation Mechanism. Replaces RSA/ECDH. Quantum-safe key exchange for all Shadow313 session establishment. PubKey: 1184B · SecKey: 2400B · Ciphertext: 1088B · NIST Security Level 3.

ML-DSA-65 — NIST FIPS 204

Module-Lattice Digital Signature Algorithm. Replaces ECDSA/RSA for signing. Used for plugin signing, API authentication, and session tokens. Sig: 3309B · NIST Security Level 3.

SLH-DSA — NIST FIPS 205

Stateless Hash-Based Digital Signature. Root of trust for 313-BIND receipts. Secure even if lattice assumptions fail. PubKey: 32B · SecKey: 64B · Sig: 17088B · NIST Security Level 5.

313 Temporal Binding Protocol

Nanosecond timestamp ending in ...313 + SHA3-512 chain hash + SLH-DSA signature + IPFS anchor. Every security event gets a cryptographically verifiable receipt. Tamper-evident even against CRQC adversaries (2030-2035 timeline).