The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 30, 2013
Filed:
Dec. 17, 2010
Sok Joon Lee, Daejeon, KR;
Jung Yeon Hwang, Gyeonggi-do, KR;
Yun Kyung Lee, Daejeon, KR;
Sin Hyo Kim, Daejeon, KR;
Sang Woo Lee, Daejeon, KR;
Hye Ran Moon, Daejeon, KR;
Young Ho Kim, Daejeon, KR;
Byung Ho Chung, Daejeon, KR;
Hyun Sook Cho, Daejeon, KR;
Sok Joon Lee, Daejeon, KR;
Jung Yeon Hwang, Gyeonggi-do, KR;
Yun Kyung Lee, Daejeon, KR;
Sin Hyo Kim, Daejeon, KR;
Sang Woo Lee, Daejeon, KR;
Hye Ran Moon, Daejeon, KR;
Young Ho Kim, Daejeon, KR;
Byung Ho Chung, Daejeon, KR;
Hyun Sook Cho, Daejeon, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
There is provided an anonymous service method of providing local linkability. The anonymous service method providing local linkability according to exemplary embodiments of the invention, an anonymous authentication operation based on a short group signature is performed, for which the concept of a local linkability is introduced to secure linkability within the same service domain. Namely, in the interior of a service provider, a virtual index having a fixed value is calculated for each service user, and in this case, although a plurality of service providers collude with each other, they cannot calculate a virtual index having the same value, whereby the linkability can be secured within the same service domain but not within the interiors of different service domains.