• Vitalik Buterin warned that enforcing one digital ID per person, even with ZK proofs, could eliminate pseudonymity and heighten surveillance risks.
  • He proposed “pluralistic identity” systems involving multiple ID providers to ensure privacy, inclusivity, and error tolerance.

Ethereum co-founder Vitalik Buterin has introduced a new concept called "pluralistic identity" in a recent blog post, proposing it as a way to preserve privacy while allowing fair participation in digital systems.

In his post, Buterin warned that even privacy-focused digital ID systems, such as those using zero-knowledge (ZK) proofs, can pose risks if they enforce a rigid one-ID-per-person model.

Despite the growing popularity of ZK technology, he cautioned that it may still undermine key values like pseudonymity and inclusivity.

ZK Tech Isn’t a Silver Bullet

Buterin acknowledged the benefits of ZK proofs, which enable users to verify their identity without revealing personal information. Notable projects like World ID, Taiwan’s digital ID initiative, and various EU programs already rely on such technology.

“ZK-wrapping solves a lot of important problems,” Buterin wrote, but added that “ZK-wrapped ID still has risks,”

particularly when systems rigidly enforce a single identity. This, he argued, could erode the ability to maintain separate pseudonymous accounts, thereby exposing users to potential surveillance from employers or governments.

The Case for Pluralistic Identity

Buterin emphasized the importance of avoiding a monopoly in identity verification.

“Any form of pluralistic identity… is naturally more error-tolerant,” he wrote.

Instead of relying on a sole authority, pluralistic systems could draw on multiple ID providers, including governments and social platforms.

He also criticized “proof of wealth” as an anti-Sybil tool, noting that it concentrates power among the rich and excludes those who can't afford access. A more balanced system, he said, would allow users to obtain multiple IDs, but at an increasing cost to prevent abuse.

Ultimately, Buterin suggested combining social-graph-based systems with one-per-person models to build a decentralized, inclusive, and resilient identity framework.

Edited by Annette George