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:
Oct. 27, 2014
Filed:
Apr. 21, 2013
Samsung Electronics Co., Ltd., Suwon-si, KR;
Weon-il Jin, Suwon-si, KR;
Dae-youb Kim, Seoul, KR;
Hwan-joon Kim, Seoul, KR;
Sung-joon Park, Seoul, KR;
Jung-hee Cheon, Seoul, KR;
Myung-hwan Kim, Seoul, KR;
Nam-su Jho, Seoul, JP;
Eun-sun Yoo, Namyangju-si, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
A user key management method for a broadcast encryption includes assigning node path identifiers (IDs) to nodes arranged in sequence; assigning random seed value keys to the nodes according to the node path IDs; generating key values by repeatedly applying a hash function to the assigned random seed value keys; and assigning the generated key values to the nodes in sequence. Accordingly, it is possible to reduce the transmission overhead that is most important matter in the broadcast encryption to less than the number of the revoked users. Further, there is an advantage that the transmission overhead of the exemplary embodiments of the present invention is remarkably reduced compared with the Subset Difference method.