industry · quantum risk
Is Hot wallets Quantum Proof? Industry Quantum Risk
Verdict
Hot wallets are high classical and quantum-relevant risk. Online classical keys can be stolen today and are Shor-vulnerable in a CRQC future—minimize balances and harden ops.
Overview
Hot wallets trade convenience for exposure. Quantum does not remove the need for classical key theft defenses.
Cryptographic profile
- Signatures: Online signing keys (ECDSA/Ed25519 typical), Withdrawal service identities
- Hash: Chain transaction hashes
- Public-key exposure: Keys on networked systems authorizing frequent withdrawals.
- Vertical: exchanges
What breaks
- Single-cloud HSMs without dual control
- Overfunded hot wallets
- Shared deployer keys across chains
Mitigations
- Balance caps and automated sweeps
- Per-chain key isolation
- Monitor for algorithm migration options per chain
FAQ
Cold storage solves quantum?
Helps ops exposure; cold classical keys are still not PQC.
Related?
/industries/exchanges/custody
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