Mysten Labs Achieves Quantum-Safe Devnet Transaction Milestone

What Changed on Devnet

Sui's codebase now includes a new entry, SignatureScheme::MLDSA65 = 7, which registers the post-quantum scheme alongside the network's existing signature options.

What's Behind ML-DSA-65

ML-DSA-65 is standardized by NIST under FIPS 204 and rated at Level 3 security. Sui intends it for everyday native accounts, the ordinary wallets people use to send tokens and interact with apps.

What's Next for Sui

The devnet transaction is one step in a plan Sui laid out in its August 2026 quantum readiness strategy. Quantum-safe vaults built on SLH-DSA-SHA2-128s are aimed at mainnet in 2026, ahead of the account-level upgrade. Native ML-DSA-65 account support follows, with a Q1 2027 target contingent on audit results and testnet feedback.

What This Means for Sui and Its Users

For everyday SUI holders, nothing changes today. The feature lives on devnet, it is opt-in, and mainnet account support is still more than a year out under the current target.

What This Means for Developers and Institutions

For developers and institutions, the more immediate item is the vault upgrade. Teams managing large Move smart contract treasuries will want to watch whether SLH-DSA-SHA2-128s vaults actually hit mainnet on the 2026 schedule, and how audits treat the implementation.

What's Next for Adoption

Adoption is the other open question. An opt-in security feature only protects the people who opt in. The key metrics to watch are testnet feedback, audit outcomes, and whether the vault and account upgrades land on their stated schedules.