Invention Grant
- Patent Title: Method and apparatus for updating a group key
- Patent Title (中): 用于更新组密钥的方法和装置
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Application No.: US11819604Application Date: 2007-06-28
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Publication No.: US08374353B2Publication Date: 2013-02-12
- Inventor: Dae Youb Kim , Mi Suk Huh , Tae-Chul Jung , Hwan Joon Kim
- Applicant: Dae Youb Kim , Mi Suk Huh , Tae-Chul Jung , Hwan Joon Kim
- Applicant Address: KR Suwon-si
- Assignee: Samsung Electronics Co., Ltd.
- Current Assignee: Samsung Electronics Co., Ltd.
- Current Assignee Address: KR Suwon-si
- Agency: NSIP Law
- Priority: KR10-2006-0094324 20060927
- Main IPC: G06F21/00
- IPC: G06F21/00

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.
Public/Granted literature
- US20080075286A1 Method and apparatus for updating a group key Public/Granted day:2008-03-27
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