Post-quantum cryptography at blockchain scale.
Three cryptographic pillars.
Module-lattice digital signature verification. Used for transaction signing, validator messages, and contract authentication where fast verification matters.
Stateless hash-based signature verification. Conservative design with minimal cryptographic assumptions — a high-confidence fallback for long-lived keys.
Key encapsulation for establishing shared secrets. Used in hybrid key exchange and sealed-state encryption.
Why post-quantum, and why now.
Adverscripts already record encrypted traffic today, intending to decrypt it once a sufficiently large quantum computer exists. Any data that must remain confidential for years is already at risk.
A large-scale quantum computer running Shor's algorithm breaks RSA, ECDSA, and ECDLP — the signatures and key exchanges that secure virtually every blockchain today.
Reduces the effective security of symmetric primitives from n bits to ~n/2 bits, requiring doubled symmetric key sizes to preserve current strength.
Validator keys, root keys, and treasury keys are long-lived. A 10-year key must resist 10 years of stored ciphertext — and 10 years of quantum progress.
NIST's PQC standardization (FIPS 203/204/205) gives the industry vetted, peer-reviewed algorithms to migrate to — not experimental designs.
The architecture must support algorithm substitution without a network fork, so new standards can be adopted as they arrive.
Deep-dive technical pages.
Module-Lattice-Based Digital Signature Algorithm — formerly associated with CRYSTALS-Dilithium.
ReadModule-Lattice-Based Key Encapsulation Mechanism — derived from CRYSTALS-Kyber.
ReadStateless Hash-Based Digital Signature Algorithm — derived from SPHINCS+.
ReadClassical + post-quantum dual-validation for gradual migration.
ReadWhy recorded ciphertext is a present threat.
ReadShor's, Grover's and the timeline to cryptographic relevance.
ReadSignature verification, key encapsulation and consensus in a PQC world.
ReadAlgorithm substitution and forward-compatible cryptographic design.
ReadQuantum-resistant, not quantum-proof.
Migration to post-quantum cryptography does not require instantly abandoning existing ecosystems. Hybrid signatures combine classical and post-quantum validation for a gradual, crypto-agile transition. We use "quantum-resistant" rather than "quantum-proof" where technically appropriate.
Hybrid signatures detailCRYPTO
CRYPTO