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:
Mar. 12, 2013
Filed:
Jun. 08, 2009
Applicants:
Seok-heon Cho, Daejeon, KR;
Chul-sik Yoon, Seoul, KR;
Inventors:
Seok-Heon Cho, Daejeon, KR;
Chul-Sik Yoon, Seoul, KR;
Assignee:
Electronics and Telecommunications Research Institute, Daejeon, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/32 (2006.01); H04L 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to an authorization key generating method and an authorization key updating method in a mobile communication system. A terminal and a base station generate an authorization key by using a terminal random value and a base station random value that are exchanged in an authorization key generating procedure as input data. In addition, a lifetime of an authorization key is established to be shorter than a lifetime of a root key, and the authorization key is updated with an updating period that is shorter than that of the root period.