Invention Grant
US08132020B2 System and method for user authentication with exposed and hidden keys
失效
使用暴露和隐藏键进行用户认证的系统和方法
- Patent Title: System and method for user authentication with exposed and hidden keys
- Patent Title (中): 使用暴露和隐藏键进行用户认证的系统和方法
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Application No.: US12055761Application Date: 2008-03-26
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Publication No.: US08132020B2Publication Date: 2012-03-06
- Inventor: Yunzhou Zhu , Xuebin Jiang
- Applicant: Yunzhou Zhu , Xuebin Jiang
- Agency: Morris Manning & Martin LLP
- Agent Tim Tingkang Xia, Esq.
- Main IPC: G06F21/00
- IPC: G06F21/00

Abstract:
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.
Public/Granted literature
- US20080240447A1 SYSTEM AND METHOD FOR USER AUTHENTICATION WITH EXPOSED AND HIDDEN KEYS Public/Granted day:2008-10-02
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