Sui announced plans to bring quantum-safe vaults to its mainnet within this year, introducing two NIST-approved post-quantum signature schemes. ML-DSA-65 will serve as the native protocol signature for regular accounts, while the hash-based SLH-DSA-SHA2-128s is designated for high-value vaults within Move smart contracts. The move responds to the potential threat quantum computing poses to existing elliptic curve cryptography. According to Sui, because Sui keys are deterministically derived from seeds, users can upgrade to quantum-safe keys using their existing recovery mnemonic. An already live address-alias feature lets current accounts update authorization keys without moving assets. The quantum-safe vaults are slated for mainnet deployment this year, with native ML-DSA-65 accounts expected on testnet by year-end. Account authentication is targeted for mainnet in Q1 2027. Sui said the upgrade is incremental and optional, leaving existing accounts and contracts unaffected.
Sui is moving to harden its network against quantum computing threats. In a post on X, the team said it will introduce two post-quantum signature schemes approved by the U.S. National Institute of Standards and Technology (NIST). One, ML-DSA-65, will be the native protocol signature for standard accounts. The other, a hash-based scheme called SLH-DSA-SHA2-128s, targets high-value vaults inside Move smart contracts. Both are designed to counter the risk that sufficiently powerful quantum computers could break the elliptic curve cryptography now in use.
The upgrade path is designed to be smooth. Because Sui keys are deterministically derived from a seed, existing users can shift to quantum-safe keys using their current recovery phrase. An address-alias feature already deployed on the network lets accounts change their authorization keys without transferring assets.
Timing is staged. Quantum-safe vaults should land on mainnet this year. Native ML-DSA-65 accounts are expected to hit testnet by the end of 2026. Account authentication is penciled in for mainnet in Q1 2027. Sui stressed the rollout is incremental and optional, with no impact on current accounts or contracts.
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