StarkWare Releases Client-Side ZK Prover for Smartphones and Laptops
Date: 2025-05-28 Author: Henry Casey Categories: BUSINESS
StarkWare, the company behind the scalable second-layer solution StarkNet for Ethereum, has released a new software called Stark Two (or S-two). This ZK prover is designed specifically to run on common devices — smartphones, laptops, and even browsers — making it much easier to use cryptographic proofs in everyday life.
The tool is currently in alpha and ready for testing by developers. The StarkNet mainnet is scheduled to be released later this year. S-two can run on CPUs, GPUs, and in the future, directly in web browsers.
The key feature of S-two is the ability to create ZK proofs directly on the client side. This means that users can interact with zero-knowledge applications without having to connect to remote servers or clouds. This approach not only increases privacy, but also ensures that the corresponding applications run faster.
StarkWare CEO and co-founder Eli Ben-Sasson said that the new tool “opens the door to real-world use cases for ZK proofs.” According to him, S-two outperforms previous versions of the tool by 39 times, making it especially attractive for solutions in the areas of private transactions, ZK-based identity, and verifiable AI.
Several teams have already begun testing the new prover, including Kakarot, Nexus, ZAN, and AntChain OpenLabs. These developers will be able to adapt S-two to their hardware needs and experiment with its capabilities.
Oren Katz, StarkWare's COO, told Cointelegraph that S-two will allow users to securely send messages, make payments, and verify their identity without revealing their personal data. For example, it will be possible to prove the authenticity of a transaction without having to show a current balance or verify an identity without indicating their full name.
He also emphasized that with S-two, even salaries can be transferred transparently and in the blockchain, without violating data privacy.
Recall that Vitalik Buterin, one of the founders of Ethereum, previously emphasized the importance of privacy as the basis of digital freedom. He also noted the successes in creating solutions that allow for fully autonomous transfers with ZK protection.
