Plug for https://oneshallpass.com https://oneshallpass.com. Open source. Your site-specific password is an HMAC; the key is your password and the payload is the

Plug for https://oneshallpass.com https://oneshallpass.com. Open source. Your site-specific password is an HMAC; the key is your password and the payload is the site you're logging in to. Works perfectly offline. You can optionally store an encrypted list of the sites you use (and parameters like number of symbols) to the server.