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. 24, 2012
Filed:
Feb. 26, 2009
Hak-soo Ju, Suwon-si, KR;
Choong-hoon Lee, Seoul, KR;
Young-sun Yoon, Suwon-si, KR;
Sun-nam Lee, Suwon-si, KR;
Jin-mok Kim, Yongin-si, KR;
Hak-soo Ju, Suwon-si, KR;
Choong-hoon Lee, Seoul, KR;
Young-sun Yoon, Suwon-si, KR;
Sun-nam Lee, Suwon-si, KR;
Jin-mok Kim, Yongin-si, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
Provided are a method of tracing a device key in a user key management system using a hierarchical hash chain broadcast encryption scheme (HBES) algorithm, a user key management system for executing the method of tracing a device key, and a computer program for executing the method of tracing a device key. The method of tracing a device key of an illegal decoder in a user key management system for broadcast encryption includes: tracing a device key using a binary search; and revoking the traced device key. The technology according to the present invention can be applied to prevent exposure of the device keys to hacking. The present invention provides a method of tracing which can be applied to an HBES algorithm structure.