What is Q-Day, and why is quantum a real threat?
The event horizon for classical public-key cryptography, explained.
Post-quantum cryptography (PQC) is no longer a research curiosity. NIST has finalized its first standards — ML-KEM (Kyber), ML-DSA (Dilithium), and SLH-DSA (SPHINCS+) — and regulated industries have started publishing migration timelines.
For digital-asset infrastructure, the migration is harder than for TLS. Signing keys sit inside multi-party ceremonies, hardware security modules, and on-chain smart contracts. Rotating them requires coordination across custodians, users, and protocol upgrades.
What this means for you
If you operate custody at any scale, the practical starting point is inventory: enumerate every classical primitive in your signing path, then map each to a post-quantum successor. From there, hybrid schemes let you deploy PQC alongside your existing keys without a hard cutover.
PyjusProtocol publishes open reference implementations and works directly with teams planning migrations. Reach out via the Enterprise page if you'd like a briefing.