Sui Tests Quantum-Resistant Signatures, Targets 2027 Mainnet
Mysten Labs says Sui has completed its first native quantum-resistant transaction tests on devnet after protocol version 139 was released on October 12, 2026. The update supports ML-DSA-65, a NIST-standardized post-quantum signature scheme, for transaction authorization. Sui’s quantum-resistant account support remains in development and will be optional.
Users are expected to derive quantum-resistant keys from existing recovery phrases and update authorization keys through address aliases, without moving assets or paying additional gas fees. Mysten plans to bring native ML-DSA-65 accounts to testnet and targets mainnet account authentication for the first quarter of 2027, subject to audits and testing. A separate Move smart contract using SLH-DSA-SHA2-128s is planned for high-value vaults, with a mainnet rollout targeted by the end of 2026.
The Sui quantum-resistant upgrade is a security milestone, not an immediate change to SUI’s token economics or network activity. Traders are likely to monitor audit results, testnet feedback and delivery against the roadmap; the upgrade does not require ordinary holders to act now.
Neutral
The announcement is a technical security development for Sui, but it does not directly change SUI’s token supply, utility, fees or near-term network activity. As account support remains on devnet and adoption will be optional, the immediate effect on SUI trading and market stability is likely limited. Short-term price movements may depend more on broader market conditions, with traders watching for follow-through rather than treating the test as a standalone catalyst.
Over the longer term, successful audits, testnet feedback and delivery of the planned mainnet features could strengthen confidence in Sui’s security roadmap and support its appeal to developers and users concerned about post-quantum risks. That may be modestly constructive for sentiment, but the impact is uncertain and depends on execution and adoption. Similar infrastructure announcements often have limited lasting price effects unless they lead to measurable usage or ecosystem growth. Overall, a neutral classification is appropriate.