zCloak Network Partners with Scroll to Provide a Privacy-Preserving Identity Service on Ethereum Layer 2

zCloak Network
3 min readNov 23, 2022

zCloak Network announced that it will work with Scroll to provide a privacy-preserving identity service on Ethereum L2 for Scroll users. The partnership will focus on bringing a W3C compatible DID and Verifiable Credential platform on Scroll’s L2 architecture. The collaboration will also include an exploration of call data cost optimization and general research on zk-STARK/zk-SNARK technology, etc.

Scroll is a native zkEVM layer 2 solution for the Ethereum blockchain, aiming to scale Ethereum with cutting-edge research and technology. With zkEVM to prove the correctness of EVM execution in Layer2 and the building of a complete L2 architecture around it, Scroll is providing a full zkRollup solution on Ethereum. Additionally, if Scroll provides its users with a full suite of DID and Verifiable Credential service, there will be more possibilities of use cases explored and better interaction on Scroll’s L2 structure with less friction.

zCloak Network can provide Scroll with such DID and Verifiable Credential services with its zkID.app product and related SDK. zkID.app helps users to establish their own DID on Scroll, and this decentralized identity will function as an avatar of an entity in cyberspace, and their real-world identity data will be linked to it in a privacy-preserving way, stored on user’s local devices through browser extension.

The link of real-world data to DID is made possible by verifiable credentials. In this case, zCloak wants to help Scroll construct a platform where Scroll’s users can have their identity data attested, generate Verifiable credentials (VC), and use their VCs in various applications on Scroll’s L2 network.

In more advanced use cases, services provided by zCloak Network can also serve as proof of social relations between users and organizations. Moreover, organizations can use zCloak to do KYC on their clients with an approach that preserves user privacy and data sovereignty. There are many use cases for zkID.app to be applied on Scroll, for example, DAOs can prove their treasury is above a certain number without disclosing the exact portfolio. In another case, project founders can prove that they have certain education or work experience without giving away too many details.

In conclusion, by collaborating with Scroll, zCloak Network leverages zero-knowledge proof technology to provide a unique set of DID protocols and infrastructure for Scroll’s users to use their real-world data for on-chain activities while preserving privacy. There will be implementation of both parties’ technology and products within this partnership, mainly regarding identity verification, conveying trustworthiness, and privacy protection. Both zCloak Network and Scroll are bringing Web3.0 solutions to projects and users, and we believe our collaboration will drive higher trust within the Web3.0 world.

About Scroll

Scroll is a native zkEVM Layer 2 scaling solution built to scale Ethereum. Scroll enables high-throughput, low cost smart contracts, trustless security, and the same developer experience as Ethereum L1. Scroll’s architecture consists of Scroll Node, Roller Network, and Rollup and Bridge Contracts. Putting all of these together, Scroll is able to execute native EVM bytecode on L2 while inheriting strong security guarantees from base layer Ethereum. Scroll’s visions are to empower humanity — starting with blockchain developers and users, to build in the open with the community, and to fight for decentralization and censorship resistance.

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About zCloak Network

zCloak Network is a privacy-first DID and verifiable computation infrastructure. It aims to deliver the Web3 dream of Self-Sovereignty by moving both the storage and the computation of user data into user device from centralized servers. The integrity of user computation is proven by a STARK-based ZK-VM in a browser extension. zCloak’s W3C compatible DID system can mirror real-world legal status and reputation in DeSoc. With zCloak Network, people can use their real-world data for e.g. DeFi, Identity, Biometric applications without disclosing their privacy. zCloak Network is chain-agnostic — its identity and ZKP service can be served for most public blockchains.

Website | Twitter | Discord

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zCloak Network

zCloak Network is a Real-World Identity (RWI) infrastructure for Web3. Website: zcloak.network; Product: zkid.app