An identity authentication scheme based on USB Key for Trusted Network Connect

Combining ElGamal´s signature scheme, ElGamal´s sequential multi-signature scheme and blind signature scheme, an identity authentication scheme based on USB Key for Trusted Network Connect (UKTNC-IAS) is established to resolve the problem of the limitation of TPM in the identity authentication. Because the authentication to relatively fixed TPM only stands for the machine authentication which is not equals the user authentication, USB Key is added in the identity authentication scheme in order to introduce a new trust carrier representing user to authenticate itself and gain the user credential so as to get the services form application servers. This paper proposes an identity authentication protocol (IDAP) for UKTNC-IAS, which can prove the proof that a USB Key with a valid TPM fulfills the identity authentication.