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    Home » Vitalik Buterin supports privacy-preserving zk ID systems for Web3
    Vitalik Buterin
    Vitalik Buterin
    Blockchain

    Vitalik Buterin supports privacy-preserving zk ID systems for Web3

    By Scarlett GuoJune 30, 2025No Comments2 Mins Read
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    • Ethereum co-founder Vitalik Buterin backs “pluralistic” zero-knowledge ID systems for digital identity management.
    • He argues they can offer privacy and prevent centralized control while allowing different providers to coexist.

    What happened: Buterin proposes zk-based IDs to protect user privacy

    Vitalik Buterin, co-founder of Ethereum, has published a blog post endorsing the development of pluralistic zero-knowledge (zk) digital ID systems as the most realistic way to preserve privacy in an increasingly digital world. In the post, Buterin explains that zero-knowledge proofs can verify data (like citizenship or reputation) without revealing unnecessary personal information.

    Buterin suggests a decentralised and pluralistic model for identity, where multiple issuers—governments, communities, or online services—can operate together without one central authority. He critiques singular, top-down identity models such as India’s Aadhaar system or Facebook’s login infrastructure, which consolidate control and increase privacy risks. His proposed model would instead allow different types of zk ID schemes—such as Proof of Humanity, BrightID, and IDen3—to work in parallel.

    He also highlights the importance of making zk ID systems usable for both humans and smart contracts, combining social and technical verification layers.

    Also read: Vitalik Buterin proposes partially stateless Ethereum nodes for better scalability
    Also read: Ethereum Pectra upgrade exposes wallet vulnerability’

    Why it’s important

    Digital identity is central to the future of online interaction, especially as platforms require stronger verification while users demand more privacy. Buterin’s stance supports a growing shift toward identity systems that do not rely on central databases or surveillance. Zero-knowledge (zk) proofs, a cryptographic method allowing data verification without exposure, are increasingly viewed as a solution to the tension between transparency and confidentiality.

    Governments and tech companies have often leaned toward centralised ID models, but these raise concerns about censorship, exclusion, and data misuse. In contrast, zk-based identity systems align with the Web3 ethos of decentralisation and user sovereignty. For example, Polygon ID, based on zk tech, is already being tested in some ecosystems to verify identity without storing personal data.

    Buterin’s support may influence developers and policymakers to invest in privacy-first solutions rather than replicating old models in digital form. The pluralistic structure he proposes reflects blockchain’s broader principles—interoperability, choice, and minimal trust in any single party.

    Blockchain Ethereum Fintech Technology Trends
    Scarlett Guo

    Scarlett Guo is an community engagement specialist at BTW Media, having studied Marketing at University of Bangor. Contact her at s.guo@btw.media.

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