Layer-1 blockchain network Sui has announced plans to integrate two post-quantum signature schemes approved by the National Institute of Standards and Technology (NIST) to protect user accounts and assets against future quantum computing risks.
Under the upgrade roadmap, Sui will adopt ML-DSA-65 as a native protocol-level signature scheme for everyday accounts, providing Level 3 security. The network selected Level 3 over lower parameters to ensure a robust security margin following recent AI-driven cryptographic vulnerability discoveries. Additionally, Sui will introduce SLH-DSA-SHA2-128s, a hash-based signature scheme operating inside Move smart contracts, to safeguard high-value asset vaults without requiring core protocol changes.
Sui highlighted that blockchain networks face unique exposure because public keys are permanently published onchain once an account transacts, leaving them vulnerable to “harvest-now-forge-later” attacks by future quantum computers running Shor’s algorithm. Because Sui keys derive deterministically from a seed, users can transition to quantum-safe authentication using their existing seed phrases and address aliases without transferring assets or creating new wallets.
The update will roll out as an additive, opt-in feature similar to previous upgrades like zkLogin and passkeys. Quantum-safe vaults are targeted for mainnet deployment in 2026, while native ML-DSA-65 testnet support is planned for late 2026 ahead of a full mainnet authentication release targeted for Q1 2027.
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