https://quantumdefenseservices.com/A free interactive post-quantum cryptography curriculum created by Kyeson Blake Utley.enhttps://quantumdefenseservices.com/learn/what-cryptography-does/https://quantumdefenseservices.com/learn/what-cryptography-does/Cryptography keeps secrets, catches tampering and proves who sent what. Meet keys, encryption, hashes and signatures, and see where quantum fits in.admin@ghostkey.dev (Kyeson Blake Utley)Sun, 18 Oct 2026 12:00:00 +0000https://quantumdefenseservices.com/learn/public-key-cryptography/https://quantumdefenseservices.com/learn/public-key-cryptography/How strangers agree on secrets in public: the locked-mailbox idea behind RSA, Diffie-Hellman and signatures, and the one assumption it all rests on.admin@ghostkey.dev (Kyeson Blake Utley)Sun, 18 Oct 2026 12:00:00 +0000https://quantumdefenseservices.com/learn/what-is-a-quantum-computer/https://quantumdefenseservices.com/learn/what-is-a-quantum-computer/Qubits, superposition, measurement and interference without the mysticism: what quantum computers do, why they're hard to build, and what they can't do.admin@ghostkey.dev (Kyeson Blake Utley)Sun, 18 Oct 2026 12:00:00 +0000https://quantumdefenseservices.com/learn/shors-algorithm/https://quantumdefenseservices.com/learn/shors-algorithm/How Shor's algorithm turns factoring into finding a rhythm, why quantum computers find rhythms fast, and why bigger RSA or elliptic-curve keys don't help.admin@ghostkey.dev (Kyeson Blake Utley)Sun, 18 Oct 2026 12:00:00 +0000https://quantumdefenseservices.com/learn/grovers-algorithm/https://quantumdefenseservices.com/learn/grovers-algorithm/Grover's algorithm searches N items in about √N steps. Watch amplitude amplification, and see why AES-128 stays acceptable and AES-256 is cheap insurance.admin@ghostkey.dev (Kyeson Blake Utley)Sun, 18 Oct 2026 12:00:00 +0000https://quantumdefenseservices.com/learn/harvest-now-decrypt-later/https://quantumdefenseservices.com/learn/harvest-now-decrypt-later/Encrypted data recorded today can be decrypted once a quantum computer exists. Use Mosca's inequality to see if you're already late, and what to do first.admin@ghostkey.dev (Kyeson Blake Utley)Sun, 18 Oct 2026 12:00:00 +0000https://quantumdefenseservices.com/learn/the-new-standards/https://quantumdefenseservices.com/learn/the-new-standards/FIPS 203, 204 and 205 explained for practitioners: what ML-KEM, ML-DSA and SLH-DSA do, how big they are, and which one to pick.admin@ghostkey.dev (Kyeson Blake Utley)Sun, 18 Oct 2026 12:00:00 +0000https://quantumdefenseservices.com/learn/hybrid-tls/https://quantumdefenseservices.com/learn/hybrid-tls/How X25519MLKEM768 works, which browsers and libraries already use it, what breaks, and how to check whether your connections are post-quantum.admin@ghostkey.dev (Kyeson Blake Utley)Sun, 18 Oct 2026 12:00:00 +0000https://quantumdefenseservices.com/learn/deadlines/https://quantumdefenseservices.com/learn/deadlines/CNSA 2.0, NSM-10, OMB M-23-02, NIST IR 8547, the UK NCSC and the EU roadmap: the post-quantum dates that matter, what's binding and what's guidance.admin@ghostkey.dev (Kyeson Blake Utley)Sun, 18 Oct 2026 12:00:00 +0000https://quantumdefenseservices.com/learn/cryptographic-inventory/https://quantumdefenseservices.com/learn/cryptographic-inventory/How to find every place your organization uses cryptography, what to record, how to prioritize, and the traps that hide quantum-vulnerable keys.admin@ghostkey.dev (Kyeson Blake Utley)Sun, 18 Oct 2026 12:00:00 +0000https://quantumdefenseservices.com/learn/crypto-agility/https://quantumdefenseservices.com/learn/crypto-agility/Why algorithms keep getting replaced, what crypto-agility looks like, and the design choices that turn a multi-year migration into a config change.admin@ghostkey.dev (Kyeson Blake Utley)Sun, 18 Oct 2026 12:00:00 +0000https://quantumdefenseservices.com/learn/certificates-and-signing/https://quantumdefenseservices.com/learn/certificates-and-signing/Why signatures migrate differently, how big post-quantum certificate chains get, where the web PKI is heading, and how to sign code and firmware.admin@ghostkey.dev (Kyeson Blake Utley)Sun, 18 Oct 2026 12:00:00 +0000https://quantumdefenseservices.com/learn/lattices-and-lwe/https://quantumdefenseservices.com/learn/lattices-and-lwe/Why adding a little noise to linear equations makes a problem quantum computers can't shortcut, and how that noise lets you encrypt a bit.admin@ghostkey.dev (Kyeson Blake Utley)Sun, 18 Oct 2026 12:00:00 +0000https://quantumdefenseservices.com/learn/inside-ml-kem/https://quantumdefenseservices.com/learn/inside-ml-kem/ML-KEM from the inside: Module-LWE encryption, the NTT, compression, and the Fujisaki-Okamoto transform with implicit rejection, per FIPS 203.admin@ghostkey.dev (Kyeson Blake Utley)Sun, 18 Oct 2026 12:00:00 +0000https://quantumdefenseservices.com/learn/lamport-signatures/https://quantumdefenseservices.com/learn/lamport-signatures/Build a quantum-resistant signature from nothing but a hash function, then see exactly why signing twice with one key hands an attacker forgeries.admin@ghostkey.dev (Kyeson Blake Utley)Sun, 18 Oct 2026 12:00:00 +0000https://quantumdefenseservices.com/learn/winternitz-and-merkle/https://quantumdefenseservices.com/learn/winternitz-and-merkle/Shrink one-time signatures with hash chains, then put thousands of one-time keys under one 32-byte root. The engine inside LMS, XMSS and SLH-DSA.admin@ghostkey.dev (Kyeson Blake Utley)Sun, 18 Oct 2026 12:00:00 +0000https://quantumdefenseservices.com/learn/implementation-pitfalls/https://quantumdefenseservices.com/learn/implementation-pitfalls/The math can be sound and the code still leaks. KyberSlash, a compiler-introduced branch, stateful-key reuse and broken RNGs, and how to avoid each.admin@ghostkey.dev (Kyeson Blake Utley)Sun, 18 Oct 2026 12:00:00 +0000https://quantumdefenseservices.com/learn/cryptocurrency-and-quantum/https://quantumdefenseservices.com/learn/cryptocurrency-and-quantum/Bitcoin and Ethereum sign with secp256k1, which Shor breaks. When public keys are exposed on chain, what long and short exposure mean, and migration paths.admin@ghostkey.dev (Kyeson Blake Utley)Sun, 18 Oct 2026 12:00:00 +0000