According to online reports, Ethereum co-founder Vitalik Buterin said when analyzing the risks and rewards of digital identity projects that use zero-knowledge proof that the "one person, one identity" proposal may threaten online anonymity. Vitalik said digital identity projects like World could kill the anonymity enjoyed by many Internet users, especially in the cryptocurrency space. "On the surface, the widespread adoption of zero-knowledge encapsulated digital identities seems to be a huge victory for protecting our social media, voting and various Internet services from manipulation by robots and fake accounts without compromising privacy. But if implemented too strictly, anonymity could be jeopardized." Vitalik recommends adopting a diversity model rather than a single zero-knowledge-encapsulated "one person, one identity" solution, in which no individual, institution or platform is solely responsible for issuing digital identities.