Sui Adds Post-Quantum Signatures for Quantum-Safe Accounts

PBX Science reported that the Sui Foundation "announced on August 6" plans to add two NIST-standard post-quantum signature schemes to Sui: ML-DSA-65 for everyday accounts and SLH-DSA-SHA2-128s for high-value vaults, with a testnet by the end of 2026 and a mainnet target in Q1 2027 (PBX Science).

As of 2026-08-07, there is no matching announcement on the Sui Foundation’s press center, blog, or press listings (Sui press center).

If formalized, the reported plan would put Sui on a multi-year path to quantum-safe accounts and a two-tier signature model.

What PBX Science reports on Sui’s quantum-safe plan

According to PBX Science (published 2026-08-07), the Sui Foundation said on August 6 it will:

• Adopt two NIST-standard post-quantum signature schemes: ML-DSA-65 for daily-use accounts and SLH-DSA-SHA2-128s for high-value vaults.
• Open a testnet by the end of 2026.
• Target mainnet rollout in Q1 2027.

Crypto Daily could not locate a corresponding notice on Sui’s official press center as of 2026-08-07.

Immediate impact and open questions

Analysis: If the plan is confirmed as described, near-term impact is limited. The reported timelines suggest no immediate key changes for users or developers. Wallets, custodians, and tooling providers would eventually need to add support for ML-DSA-65 and SLH-DSA-SHA2-128s, with higher-assurance flows reserved for the latter.

Referencing NIST-standard schemes could make the approach legible for enterprises pursuing long-horizon risk management around quantum threats. The absence of an official Sui post, however, leaves open questions on implementation details, migration paths, performance trade-offs, and backward compatibility.

What to watch next

Watch for an official Sui Foundation confirmation via blog or press release, and for technical specifications or proposals that detail how the two schemes would be integrated. A public roadmap update or GitHub RFC would clarify timelines and scope. If the report holds, key milestones are a testnet by end-2026 and a mainnet target in Q1 2027, along with any interim developer previews. The Sui press center remains the primary page to monitor for formal updates.

Disclaimer: This article is provided for informational purposes only. It is not offered or intended to be used as legal, tax, investment, financial, or other advice.