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:
Feb. 04, 2014
Filed:
Dec. 15, 2011
Sok-joon Lee, Daejeon, KR;
Jung-yeon Hwang, Suwon, KR;
Gun-tae Bae, Daejeon, KR;
Byung-ho Chung, Daejeon, KR;
Sin-hyo Kim, Daejeon, KR;
Hye-ran Mun, Gwangju, KR;
Sang-woo Lee, Daejeon, KR;
Yun-kyung Lee, Daejeon, KR;
Hyun-sook Cho, Daejeon, KR;
Sok-Joon Lee, Daejeon, KR;
Jung-Yeon Hwang, Suwon, KR;
Gun-Tae Bae, Daejeon, KR;
Byung-Ho Chung, Daejeon, KR;
Sin-Hyo Kim, Daejeon, KR;
Hye-Ran Mun, Gwangju, KR;
Sang-Woo Lee, Daejeon, KR;
Yun-Kyung Lee, Daejeon, KR;
Hyun-Sook Cho, Daejeon, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
Disclosed herein is a method of verifying key validity and a server for performing the method. The method is configured such that a service provision server verifies key validity in an anonymous service for providing local linkability. The service provision server receives a revocation list. A local revocation list is generated using the received revocation list and a secret key. A virtual index of a service user required to verify key validity is calculated. Whether a key of the service user is valid is verified, based on whether the virtual index is included in the local revocation list.