公开(公告)号：KR1020080072463A

公开(公告)日：2008-08-06

申请号：KR1020070011277

申请日：2007-02-02

Applicant: 삼성전자주식회사 ,  재단법인서울대학교산학협력재단

Inventor： 허미숙 ,  김대엽 ,  조남수 ,  유은선 ,  김명환 ,  천정희

IPC: H04L9/30

CPC classification number: H04L9/0836 ,  H04L9/0643 ,  H04L9/0891

Abstract: A group key management method and a group key management apparatus using the same are provided to remarkably reduce a transmission quantity required for update of a group key when the number of seceders is small. A group key management method comprises the following steps of: generating user congregation elements including at least two users and having unique common keys(S110); selecting two of the user congregation elements to generate an upper level congregation element and generating level keys of the upper level congregation elements by using at least one of the common keys of the two user congregation elements(S120); and determining whether operation of the step S120 is performed up to a preset level(S130).

Abstract translation: 提供组密钥管理方法和使用该组密钥管理装置的组密钥管理装置，以在分离器数量小时显着地减少组密钥更新所需的传输量。 组密钥管理方法包括以下步骤：生成包括至少两个用户并具有唯一公共密钥的用户聚合元素（S110）; 通过使用两个用户会众元素中的至少一个公共密钥来选择两个用户会众元素来生成上级会众元素并生成上级会众元素的等级密钥（S120）; 并且确定步骤S120的操作是否被执行到预设级别（S130）。