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Sui Confidential Transfers Hide Amounts Without Fully Adopting Monero

Sui (SUI) launched the confidential transfers feature for public testing on June 8, allowing token balances and transfer amounts to be hidden on-chain while still displaying sender and receiver addresses, as well as auditor access.

This design is very different from privacy-focused cryptocurrencies like Monero (XMR). Sui only conceals the numbers but still maintains the control needed by exchanges, analytics firms, and regulators. This feature is more aimed at institutions than full anonymity.

Privacy Model Built for Compliance

Confidential transfers enable token issuers to activate a private mode, so balances and transfer amounts remain encrypted on the Sui blockchain network. Sender and receiver addresses, token types, and transaction times are still publicly visible.

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

This encryption uses Twisted ElGamal cryptography on Ristretto255, combined with zero-knowledge proofs.

These zero-knowledge proofs allow the network to verify the validity of transfers without revealing the amounts, preventing overdrafts and unauthorized token printing at the protocol level.

Mysten Labs has published open-source code on GitHub, though it is currently unaudited and labeled as work-in-progress. This release continues the preview of the system previously revealed by the co-founder.

Differences Between Sui and Monero

Monero conceals all three layers of a transaction. Ring signatures hide the sender, stealth addresses protect the receiver, and Ring Confidential Transactions hide the transfer amount. No external party can decrypt this data.

This condition carries its own risks. Dozens of exchanges have delisted Monero due to compliance concerns, leading to more frequent delistings of privacy coins and the emergence of privacy coin rotations in the market.

Sui takes the opposite approach. Token issuers can add an auditor key so authorities can open balances if needed, and they retain the authority to freeze or seize assets.

Users can also prove balances or transfer amounts without revealing their keys.

Why Issuers and Institutions Care

This approach targets payment companies, stablecoin issuers, and treasury teams that cannot disclose their cash flows publicly. Balances can reveal strategies, while transaction sizes can show business relationships.

Bridges are now exploring this system as a platform for stablecoins and payments. TRM Labs and Merkle Science are also testing how risk assessment, monitoring, and investigation systems can operate with such privacy models.

Despite this, Sui has recently faced significant challenges, including three mainnet disruptions at the end of May.

The appeal of confidential transfers for institutional users, which is the target chain, will heavily depend on how partners and regulators respond to the controlled privacy model they introduce.

Following the launch of confidential transfers, the SUI token price rose nearly 5%, trading around US$0.76 at the time of publication. This increase aligns with the overall altcoin market rally.