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:
Jun. 24, 2014
Filed:
Apr. 04, 2011
Jung Yeon Hwang, Daejeon, KR;
Sokjoon Lee, Daejeon, KR;
Gun Tae Bae, Daejeon, KR;
Yun-kyung Lee, Daejeon, KR;
Hyeran Mun, Daejeon, KR;
Sang-woo Lee, Daejeon, KR;
Sin Hyo Kim, Daejeon, KR;
Byung Ho Chung, Daejeon, KR;
Hyun Sook Cho, Daejeon, KR;
Jung Yeon Hwang, Daejeon, KR;
Sokjoon Lee, Daejeon, KR;
Gun Tae Bae, Daejeon, KR;
Yun-Kyung Lee, Daejeon, KR;
Hyeran Mun, Daejeon, KR;
Sang-Woo Lee, Daejeon, KR;
Sin Hyo Kim, Daejeon, KR;
Byung Ho Chung, Daejeon, KR;
Hyun Sook Cho, Daejeon, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
A group signature system includes: a key issuer server for generating a first parameter of a group public key, generating a corresponding master issuing key, and issuing a signature key to a user when a user device joins; an opener server for generating a second parameter of the group public key, and a corresponding master opening key and master linking key; and a linker server for checking whether two valid signatures have been linked by using the master linking key when the two signatures corresponding to a group public key are given. The group signature system further includes: a signature verifying unit for confirming a validity of the given signatures and a signer information confirming unit for confirming a validity of singer confirming information generated by the opener server.