asset · quantum risk

ACX (Across Protocol) Quantum Risk for Holders

Risk: high · Confidence: high · Reviewed: 2026-07-19

Verdict

ACX is only as quantum-safe as controlling keys and venues. Across is not quantum-proof. Bridging intents and pools use classical EVM signatures and relayer/oracle dependencies.

Overview

ACX is the liquid ticker framing for Across Protocol in Wave 7e. Holder risk is dominated by authorization keys and venues—not slogans.

Across is an intents-based bridge popular on OP-Stack and Ethereum. Quantum risk is user EOAs, LP keys, relayers, and oracle integration.

This dossier is educational, not investment advice.

Cryptographic profile

Signatures: ECDSA-secp256k1, Relayer / UMA oracle related keys as integrated
Hash: Keccak-256
Public-key exposure: Intent/bridge relayers and LP pools; user EOAs on origin/destination.

What breaks

Hot wallets controlling large ACX balances
Unmapped bridges, issuers, or L2 operators
Wrong host-chain assumption for multi-chain assets

Mitigations

Hardware / multiparty treasury policies
Document chain, bridge, and custodian for every balance
Read /is-quantum-proof/across for mechanism detail

FAQ

Is ACX quantum-proof?

Across is not quantum-proof. Bridging intents and pools use classical EVM signatures and relayer/oracle dependencies.

Related?

Bridges hub, Optimism, Ethereum.

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