Sui Launches zkAt, Privacy-First Auth for the Web3 Era

• zkAt lets users prove authentication without revealing any policy or identity structure to the network or validators.
• zkAt+ allows authentication policies to be updated privately, keeping all access logic hidden from the public.

The Sui development team has just announced the launch of a new technology called zkAt (Zero-Knowledge Authenticator). The Sui team says zkAt could be more impactful than zkLogin, Plasma, and even the Lightning Network combined.

Prediction: zkAt will be more impactful than I can imagine (and I can imagine a ton of use cases already) https://t.co/vtUhv70pRf

— evan.sui (@EvanWeb3) May 24, 2025

zkAt and the Future of On-Chain Access

But what exactly is zkAt? It’s an authentication technology that uses the principle of zero-knowledge. This means that users can prove that they have authority or access, without revealing how the authentication system or policy works. For those familiar with multisig or smart contracts, this is a game changer.

What if you could prove that you have access to a digital vault, but without telling anyone what combination is used, who is authorized, or even the format of the system. It’s quite intriguing and unnerving.

Furthermore, zkAt does more than just wrap authentication in privacy. It’s also said to be as efficient as traditional signatures, with the added benefit that policies can be updated without having to reveal anything to the public.

Its advanced version, zkAt+, even claims to be able to do this while keeping all its logic hidden. At first glance, it sounds like technology suitable for spy movies, but now it is being prepared for the Web3 space.

Big Money, Bigger Moves: Sui’s Quiet Expansion

On the other hand, this comes at a time when the Sui ecosystem is experiencing a surge of interest. A few days ago, the total value of funds locked (TVL) in Sui jumped to $2.1 billion. The Sui system integration with Microsoft was the reason behind this increase.

This news has made many investors and developers start to take another look, especially with the increasing flow of stablecoin deposits, a classic indicator that institutions and whales are coming together again.

In addition, in mid-May, Sui also partnered with Bitlayer to introduce Peg‑BTC into its ecosystem. This is a kind of bridge that allows Bitcoin assets to “enter” and be used in the Sui DeFi space, via BitVM. As a result, Sui’s interoperability has become even wider. So, while they are busy making authentication more secretive, they are also secretly inviting Bitcoin to join the party.

On the other hand, CNF previously reported that the network is preparing a whitelist function to help the process of returning stolen funds to liquidity providers. Of the total of around $220 million that was stolen, around $63 million is reported to have crossed over to the Ethereum network. Unfortunately, that makes it almost impossible to return.

Meanwhile, as of press time, SUI is trading at about $3.60, down 1.25% over the last 24 hours and 5.95% over the last 7 days.

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