zkapcha

A zk-based CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) on the Mina Protocol leverages zero-knowledge proofs (zk-SNARKs) to enhance privacy and security in user verification processes. Unlike traditional CAPTCHAs, which may expose user interaction data, a zk-based CAPTCHA allows users to prove they have successfully completed a CAPTCHA challenge without revealing any identifying information or challenge details.

On the Mina Protocol, known for its lightweight blockchain and zk-SNARK technology, this system enables users to authenticate themselves privately and efficiently. The CAPTCHA's zk-proof verifies human interaction while preserving user privacy by ensuring no unnecessary data is shared or stored. Additionally, Mina's minimal blockchain size ensures that the CAPTCHA verification remains scalable and decentralized, enhancing the security of applications without adding computational or storage burdens to the network.