A method including generating a first and second One Time Password (OTP) token from a shared clock, receiving a third OTP token, and comparing the second and the third OTP tokens. A system including a number generator residing on a first server to generate first and second One Time Password (OTP) tokens from a shared clock, a transmitter residing on the first server to transmit the first and the second OTP tokens, a receiver residing on a second server to receive the first, the second, and a third OTP tokens, and a comparator residing on the second server to compare the second and the third OTP tokens to authenticate an identity of a party who generates the third OTP token.