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Arbitrum One ARB

Rank #11 by market capNo quantum-safe path live
Market cap
$1.1B
▼ 1.14% 24h
DeFi TVL
$1.4B
DefiLlama
Exposed share of supply
n/a
No published estimate
Value in exposed keys
n/a
Signature scheme
secp256k1 ECDSA
Key hidden until first signature
Yes

An EVM address is the last 20 bytes of the Keccak-256 hash of the secp256k1 public key, so an account that has only received funds has not revealed its key. The first transaction an externally owned account sends carries an ECDSA signature from which the public key is recovered, and it stays exposed for the life of the account. Contracts and smart accounts have no key of their own; exposure sits with whichever keys are authorised to control them.

Quantum-safe path
None live

Not live. Arbitrum docs state the chain is designed to be as compatible with Ethereum as possible, including Keccak-256 hashes and secp256k1 signatures. No Offchain Labs or Arbitrum Foundation post-quantum roadmap was found as of 2026-09-17; the chain would inherit Ethereum's account abstraction path (EIP-8141) if adopted.

No published exposure measurement yet

No chain-specific measurement of the share of supply in accounts with an exposed key was found. The exposure model is the same as Ethereum (EOA key revealed on first send), so a figure can be computed from this chain's own state, but no published study was located. Gas is paid in ETH; the ARB token is a governance asset.

Sources