Patent ID: 8543829

Claim:
A system comprising: a One-Time Password (OTP) device operatively coupled to a computer system to receive data from the computer system; and a server of a site being accessed by the computer system, the server of the site being operatively coupled to the computer system through a network connection, the OTP device generating a first OTP token value and a second OTP token value using a clock synchronized with a clock of an authentication server separate from the server of the site being accessed, the first OTP token value being used to verify, at the computer system, an OTP token value generated by the authentication server and received from the server of the site being accessed by comparing the first OTP token value to a series of OTP token values presented at the same time that are received from the server of the site being accessed for a matching OTP token value in the series, and the second OTP token value being sent to the server of the site for verification against a token of the authentication server in a two factor authentication process.