Who this is for — Anyone managing API keys, crypto wallets or IT compliance at brokers/exchanges. Future quantum threatens RSA/ECC; PQC migration should be planned now.
Post-quantum security (PQC) denotes algorithms and protocols resistant to attacks with sufficiently powerful quantum computers — replacements for RSA, ECDSA and classical TLS with lattice, hash, code-based schemes, etc. (NIST standardization).
In plain terms — New locks for when quantum machines can break current ones — «harvest now, decrypt later» makes transition urgent.
Why it matters in finance
| Asset | Risk |
|---|---|
| Trading APIs | Keys intercepted today, decrypted tomorrow |
| Crypto wallets | ECDSA signatures vulnerable long-term |
| Documents | NDAs, contracts, KYC encrypted with RSA |
| Blockchain | PQC roadmaps for layer-1/layer-2 |
Quantum computing is not only portfolio optimization: it is a cryptographic threat to all digital market infrastructure.
Practical migration
- Inventory cryptography in use (TLS, signatures, storage)
- Hybrid mode: classical + PQC during transition
- Monitor NIST PQC standards and vendors (Cloudflare, HSM…)
- Exchange/broker key rotation policy
Common mistake — Ignoring PQC because «quantum does not exist yet» — data encrypted today can be stored for future decryption.
Example — Desk rotates API keys every 90 days + TLS 1.3 with updated cipher suites — minimum prep while evaluating enterprise ML-KEM.
Card
- Threat: harvest now, decrypt later.
- Action: inventory + hybrid PQC pilot.
- Hub: AI & markets.
Sources
- NIST, Post-Quantum Cryptography - project scope and standards.
- NIST, FIPS 203 - ML-KEM key-encapsulation standard.