mCaptcha – Proof of work based, privacy respecting CAPTCHA system

Re:mCaptcha – Proof of work based, privacy respecting CAPTCH... by turbocon on Thursday August 04, 2022 @06:35AM (#32341270)

This is a really intriguing idea. What would stop a spammer from taking the time to get a single token and sharing it among a pool of bots?

[ Parent | on HN ]

Re:mCaptcha – Proof of work based, privacy respecting CAPTCH... by realaravinth on Thursday August 04, 2022 @06:44AM (#32341333)

Glad you ask!

There are protections against replay attacks within mCaptcha: tokens are single use also have a lifetime beyond which they are invalid.

Disclosure: author of mCaptcha

[ Parent | on HN ]