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:
Apr. 21, 2015
Filed:
Apr. 27, 2006
Bong-seon Kim, Seongnam-si, KR;
Myung-sun Kim, Uiwang-si, KR;
Sung-hyu Han, Seoul, KR;
Young-sun Yoon, Suwon-si, KR;
Sun-nam Lee, Suwon-si, KR;
Jae-heung Lee, Suwon-si, KR;
Bong-seon Kim, Seongnam-si, KR;
Myung-sun Kim, Uiwang-si, KR;
Sung-hyu Han, Seoul, KR;
Young-sun Yoon, Suwon-si, KR;
Sun-nam Lee, Suwon-si, KR;
Jae-heung Lee, Suwon-si, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
A method of and apparatus for encrypting and/or decrypting content according to broadcast encryption scheme. The decryption method includes: determining whether or not a revoked device among devices that have licenses for predetermined content is present; and according to the determination result, selectively decrypting a content key encrypted by using a key to prevent the revoked device from decrypting the predetermined content. By doing so, an unnecessary encryption process and decryption process that occur when there is no revoked device are avoided.