SQRL or Secure, Quick, Reliable Login (pronounced "squirrel" /ˈskwɝl/ About this sound en ) (formerly Secure QR Login) is a draft open standard for secure website login and authentication. The software solution typically uses a QR code, which provides authentication, where a user identifies anonymously rather than providing a user ID and password. This method is thought to be impervious to a brute force password attack or data breach.