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:
Feb. 12, 2013
Filed:
Jun. 28, 2007
Dae Youb Kim, Seoul, KR;
MI Suk Huh, Suwon-si, KR;
Tae-chul Jung, Seongnam-si, KR;
Hwan Joon Kim, Seoul, KR;
Dae Youb Kim, Seoul, KR;
Mi Suk Huh, Suwon-si, KR;
Tae-Chul Jung, Seongnam-si, KR;
Hwan Joon Kim, Seoul, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
A method and apparatus for updating a group key of a group corresponding to a binary tree are provided. The method includes updating keys of leaf nodes that correspond to new members, in response to a join of at least two new members joining the group; determining whether both of two child nodes of a single ancestor node are updated when updating a key of the single ancestor node of the leaf nodes; establishing one of the two child nodes as an update use node when both the two child nodes are updated; and updating a key of the ancestor node using the updating node. Thus, the group key may be effectively updated with respect to multi-join.