US Patent 11245526 Full-duplex password-less authentication

Upon an attempt to access a service of a third-party server, full-duplex password-less authentication provides a one-time password to the user displayed at the client device and at a mobile device associated with the user. The user verifies the access by comparing the one-time password displayed at the mobile device and the one-time password displayed at the client device. The one-time password is displayed as a combination of a picture and a set of alphanumeric characters for ease in making the comparison. The user determines whether to accept or deny the authentication sequence after a simple visual comparison.