China warned about the use of biometric data by crypto projects, citing potential threats to privacy and national security. The Ministry of State Security highlighted risks of iris, facial, and fingerprint data collection by overseas entities. Concerns were raised about World collecting iris data globally for its token. Iris data leaks were deemed irreversible, posing security risks. Facial recognition misuse could lead to privacy breaches and national security threats. Foreign agencies were accused of using falsified facial data for espionage. Vitalik Buterin proposed pluralistic digital ID systems to protect privacy and inclusivity. He warned against rigid, trackable IDs and favored multiple verification sources to prevent surveillance and exclusion.

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