Introducing Zero-Knowledge Proofs for Private Web Attestation with Cross/Multi-Vendor Hardware

Cloudflare has introduced Cryptographic Attestation of Personhood, a new method for proving identity or other properties of a user with a piece of hardware. This technique replaces CAPTCHAs with USB security keys and supports on-device biometric hardware. The company aims to improve privacy across the internet by using attestation in the WebAuthn standard, which lets websites know that your security key is authentic without revealing any sensitive information about the user or their device. Cloudflare has also open-sourced the code for this proof of personhood so everyone can benefit and contribute.