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:
Aug. 23, 2011
Filed:
Jan. 27, 2006
Dae-youb Kim, Seoul, KR;
Hwan-joon Kim, Seoul, KR;
Sung-joon Park, Seoul, KR;
Weon-il Jin, Suwon-si, KR;
Dong-hoon Lee, Goyang-si, KR;
Dae-youb Kim, Seoul, KR;
Hwan-joon Kim, Seoul, KR;
Sung-joon Park, Seoul, KR;
Weon-il Jin, Suwon-si, KR;
Dong-hoon Lee, Goyang-si, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
A hierarchical threshold tree-based broadcast encryption method includes a first step for a server initialization and a user subscription, a second step of distributing a message to enable a privileged user (authorized user) to decrypt a group key, and a third step of the privileged user (authorized user) decrypting the message using the group key. According to the method, it is possible to prevent any group of revocators from obtaining the group key using their secret information and information being broadcast by the server.