Resources Contact Us Home
System and method for user authentication with exposed and hidden keys

Image Number 10 for United States Patent #8132020.

The present invention relates to a system and method for digitally authenticating users both online and offline. In one embodiment, a hardware token assigned by a trusted token provider to the user is employed to ensure the identity of the user. In the online authentication, the token is adapted for generating an exposed key EK and a hidden key HK based on a noise code NC and a time code TC of the token, a space code SC of a service server, and an owner code OC of the user. A login session is initialized by entering a user identifier at the service server and the generated EK from a computing device. The service server computes an expose key CEK and a hidden key CHK based one an authentication license generated by the token provider. The service server authenticates the user if the CEK is same as the EK, and sends a response message encrypted the CHK to the computing device. Then, the user provides the HK to the computing device to decrypt the encrypted response message so as to access his/her account. In the offline authentication, the token is adapted for generating a license exposed key LEK used to render the encrypted digital content on an offline compliant device. The compliant device authenticates the user if a license exposed key computed by the compliant device based on a content license of which the user bought is same as LEK, so as to render the protected digital content after authentication.

  Recently Added Patents
Nuclear fission reactor, a vented nuclear fission fuel module, methods therefor and a vented nuclear fission fuel module system
Cellulose ester compositions having low birefringence and films made therefrom
Water bottle warning triangle
Facial recognition using a sphericity metric
Data converter with configurable functions
Method for producing SOI substrate and SOI substrate
Method and system for providing an intelligent visual scrollbar position indicator
  Randomly Featured Patents
Head and neck immobilizer
Transparent double-injection field-effect transistor
Combined compressor and lamp
Write queue descriptor count instruction for high speed queuing
Fluoropolymer compositions
Process for the preparation of di-tert.butoxydiacetoxysilane
Automated banking machine apparatus and system
Retractor plate for integral child restraint seat
System and method for providing diagnosis information