Sui launches confidential transfers beta on Devnet

Sui opened a public beta of confidential transfers on Devnet on June 8. The feature encrypts token balances and transfer amounts while keeping sender and receiver addresses, token type and transaction timing visible. Authorized auditors can decrypt data when issuers permit access.

The implementation uses Twisted ElGamal cryptography over Ristretto255 combined with zero-knowledge proofs. Those proofs allow the network to verify a transfer is valid without revealing the amount and prevent overdrafts and unauthorized token creation at the protocol level. Mysten Labs published the code on GitHub; the repository is labeled a work in progress and has not completed external audits. A Testnet release is targeted later this year.

Sui’s design differs from privacy-focused coins that hide sender, receiver and amount details. Token issuers can attach auditor keys so designated parties can decrypt balances and transfer amounts when required, and issuers retain freeze and seizure capabilities. Users can generate cryptographic proofs of a balance or transfer amount without revealing private keys to enable selective disclosure for compliance or settlement.

The feature is aimed at payment providers, stablecoin issuers and corporate treasury teams that need to keep numeric values private while retaining auditability. Bridge is testing the system for stablecoin and payments use cases. Analytics and compliance firms TRM Labs and Merkle Science are testing risk scoring, monitoring and investigations within the confidential framework.

Sui experienced three mainnet outages in late May. After the confidential transfers debut the SUI token rose about 5% and was trading near $0.76 at the time of reporting.

The announcement stated, “Confidential transfers is now available in public beta on Devnet, with a Testnet launch targeted later this year.”