coin-auth

This plugin prevents brute force logins on your WordPress website by implementing Coinhives's captcha API to verify login attempts via a proof of work authentication system. Coinhive will verify tokens that are received by performing small amounts of crypto-mining in the browser. Once the client receives a token they will submit it with their login request to Coinhive, which then verifies the one-time-use token to verify that amount of work was performed by the client requesting to authenticate to the site. Why would you want to do this? It deters attackers from submitting large amounts of valid login requests as it would require the adversary to perform a lot of crypto-mining for the administrator of the website and adds time to an already time-consuming task of cracking WordPress credentials.