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Cardano ADA

Rank #7 by market capNo quantum-safe path live
Market cap
$7.5B
▲ 4.40% 24h
DeFi TVL
$52.9M
DefiLlama
Exposed share of supply
n/a
No published estimate
Value in exposed keys
n/a
Signature scheme
Ed25519
Key hidden until first signature
Yes

The payment part of a Shelley address is a blake2b-224 hash of an Ed25519 verification key (CIP-19), so a receive-only address has not revealed its key. Spending requires a verification-key witness (public key plus signature) in the transaction, which publishes the key; HD wallets rotate addresses but reuse is common.

Quantum-safe path
None live

Not live. Input Output Research's Cardano Vision 2026 (19 June 2026) targets a post-quantum VRF for slot leader election, security proofs for an updated Ouroboros, a prototype and a migration CIP, and investigates zero-knowledge migration of wallet addresses. CIP-0197 (pull request opened 7 August 2026, still open) proposes an optional zero-knowledge proof of the HD seed alongside the existing Ed25519 signature, keeping keys and addresses unchanged; it is not merged or deployed.

No published exposure measurement yet

No published measurement of the share of ADA in addresses whose key has been revealed by a spend was found.

Sources