Information security – Access control or authentication
Reexamination Certificate
2007-09-24
2011-11-15
Song, Hosuk (Department: 2435)
Information security
Access control or authentication
C726S003000, C726S004000, C726S005000, C713S168000
Reexamination Certificate
active
08060914
ABSTRACT:
The present invention provides an anonymous selectable credential system and method therefor. In the system, a credential authority issues root credentials to a user for certain user rights. The user generates an anonymous selectable credential from the root credentials that correspond to a selected set of user rights, and presents the anonymous selectable credential to a service. Using the anonymous selectable credential, the user can prove to the service through a knowledge proof that the selected set of user rights was granted by the credential authority. Then the service may provide service to the user according to the verified user rights. By generating and presenting different anonymous selectable credentials, the user could remain anonymous no matter how many times he/she accessed one or more services. The user can selectively prove any portion of his/her full set of rights, and no matter how many rights is to be proved, the computational cost is basically the same as that for proving only one right.
REFERENCES:
patent: 7444644 (2008-10-01), Slaughter et al.
patent: 7716492 (2010-05-01), Saulpaugh et al.
patent: 2003/0177352 (2003-09-01), Camenisch et al.
patent: 2004-320562 (2004-11-01), None
patent: 2005/116794 (2005-12-01), None
NEC (China) Co., Ltd.
Song Hosuk
Sughrue & Mion, PLLC
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