Sui Prepares for Quantum Computing Threat with Post-Quantum Signature Schemes
Sui, a next-generation Layer 1 blockchain, has announced its move towards quantum readiness by adopting two post-quantum signature schemes. This decision aims to address the vulnerability of public keys onchain, which can be broken using Shor's algorithm. Google Quantum AI estimated in March 2026 that recovering a private key from an exposed public key would take minutes on a fault-tolerant machine with under half a million physical qubits.
The blockchain is adopting ML-DSA-65 (FIPS 204) for native accounts and SLH-DSA-SHA2-128s (FIPS 205) for smart contract vaults. These signature schemes are matched to different kinds of risk, rather than betting on one algorithm. The adoption of post-quantum cryptography will not require a forced migration or the transfer of assets.
The implementation is built and benchmarked, with quantum-safe vaults targeted for Mainnet this year. Native ML-DSA-65 accounts are expected to reach Testnet by end of year, and native account authentication on Mainnet is targeted for Q1 2027. Wallet, SDK, and CLI support will arrive alongside.