chain · quantum risk
Across Protocol Cryptography & Quantum Risk Profile
Verdict
Profile view: Across is not quantum-proof. Bridging intents and pools use classical EVM signatures and relayer/oracle dependencies.
Overview
This is the Wave 7e network/profile page for Across Protocol (app).
Across is an intents-based bridge popular on OP-Stack and Ethereum. Quantum risk is user EOAs, LP keys, relayers, and oracle integration.
Fast fills do not change signature hardness.
Verdict hub: /is-quantum-proof/across. Asset framing: /crypto/acx.
Cryptographic profile
What breaks
- Classical signatures authorizing ACX value under Shor-class adversaries once public keys are known
- Custodial hot wallets and exchange operational keys
- Bridges, issuers, or operator sets outside ordinary user wallets
- Protocol admin, oracle, or guardian keys
Mitigations
- Inventory every key that can move ACX (self-custody, exchange, multisig, protocol roles)
- Name the host chain and bridge path for every balance
- Document operator/admin sets for L2s and apps
- Track ecosystem PQC research; branding is not deployment
- Use /assessment and claims methodology pages for program framing
FAQ
Intents = PQC?
Intent UX is application design; crypto remains classical host-chain signatures.
Related?
Bridges hub, Optimism, Ethereum.
Key concepts (technical dictionary)
Terms used on this page — open a definition: