The Privacy Pass server uses key rotation to make the tokens expire after a certain period of time. The documentation also hints at other measures including rat

The Privacy Pass server uses key rotation to make the tokens expire after a certain period of time. The documentation also hints at other measures including rate limiting and using a web application firewall: https://github.com/privacypass/challenge-bypass-extension/blob/master/docs/PROTOCOL.md#stockpiling-of-passes https://github.com/privacypass/challenge-bypass-extension/bl...