There are better ways, that involve more computation on the client side. For example, HIBP does not send your password (or its complete hash) to the backend in

There are better ways, that involve more computation on the client side. For example, HIBP does not send your password (or its complete hash) to the backend in order to find if it has been previously exposed. They use this method: https://blog.cloudflare.com/validating-leaked-passwords-with-k-anonymity/ https://blog.cloudflare.com/validating-leaked-passwords-with...