Privacy Pass is an open-source project that provides a solution to one of the longstanding challenges of the web: anonymous authentication. It allows websites to get the information they need from users, and solely this information, in a manner that is privacy protective and often seamless. The latest version of Privacy Pass includes several improvements, including support for multiple attesters, more robust cryptographic algorithms, and better integration with modern browsers. The protocol works by having clients obtain tokens issued by an issuer. It does this in a way that protect user privacy.