For users seeking a more streamlined and private browsing experience, Privacy Pass is a browser extension designed to make the internet more accessible. It achieves this by introducing an anonymous user-authentication mechanism, particularly for cases where users are required to complete a proof-of-work, such as solving an internet challenge, to authenticate to a service.
Privacy Pass interacts with supporting websites to provide 'passes' that can be used to bypass future challenge solutions. The extension generates random nonces as tokens, which are then blindly signed by the challenge provider. These tokens are later used for anonymous redemption, ensuring that the user remains private.
The Privacy Pass protocol is exceptionally fast and guarantees privacy for the user, making it safe for those with strict anonymity restrictions. It is particularly useful for users browsing websites protected by Cloudflare or using hCaptcha.
Privacy Pass is available as an open-source project on GitHub, with implementations for both the browser extension and a compatible server implementation.