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1. 发明申请

WO2013005989A3 METHOD AND APPARATUS FOR MANAGING GROUP KEY FOR MOBILE DEVICE 审中-公开
标题翻译：用于管理移动设备的组密钥的方法和设备
公开(公告)号：WO2013005989A3
公开(公告)日：2013-04-04
申请号：PCT/KR2012005312
申请日：2012-07-04
申请人： SAMSUNG ELECTRONICS CO LTD , SNU R&DB FOUNDATION , SUH KYUNG-JOO , PARK YOUNG-HOON , SEO SEUNG-WOO , JE DONG-HYUN , BAE BEOM-SIK , BAEK YOUNG-KYO , CHOI SUNG-HO , JEONG SANG-SOO
发明人： SUH KYUNG-JOO , PARK YOUNG-HOON , SEO SEUNG-WOO , JE DONG-HYUN , BAE BEOM-SIK , BAEK YOUNG-KYO , CHOI SUNG-HO , JEONG SANG-SOO
IPC分类号： H04L9/08 , H04L9/14 , H04W12/04
CPC分类号： H04W12/04 , H04L9/0833 , H04L9/0891 , H04L9/3073 , H04L63/0442 , H04L63/062 , H04L63/065 , H04L63/068 , H04L2209/80
摘要： The present invention pertains to a group key, and relates to a group key management method of a key distribution center, comprising the steps of: receiving a key request from a mobile device; generating a private key for the mobile device when leaving time information is included in the key request; generating a public key and a verification key for the mobile device; transmitting at least one key, including the generated key, to the mobile device; verifying whether or not a counterpart belongs to the same group as a leaving time of the counterpart, a public key of the counterpart, and a verification key of the counterpart; comparing the versions of group keys when the counterpart belongs to the same group, and allowing a device having a group key of a latest version to encrypt the group key of the latest version with a session key and to transmit the encrypted group key to a counterpart device; and allowing the counterpart device, which has received the group key, to decrypt the group key and to perform an update. The use of a group key enables a communication cost required for data transmission to be reduced, and, when a group key is updated, even mobile devices, which have not received the group key from a base station, can later receive the group key from the base station or another mobile device which belongs to the same group.
摘要翻译：本发明涉及一种群组密钥，并且涉及一种密钥分配中心的群组密钥管理方法，包括以下步骤：从移动装置接收密钥请求; 当离开时间信息被包括在密钥请求中时为移动设备生成私钥; 为移动设备生成公钥和验证密钥; 将包括所生成的密钥的至少一个密钥发送到移动设备; 验证对方是否属于与对方的离开时间相同的组，对方的公开密钥和对方的验证密钥; 当对方属于同一组时，比较组密钥的版本，并允许具有最新版本的组密钥的设备用会话密钥加密最新版本的组密钥，并将加密的组密钥发送给对方设备; 并且允许接收到组密钥的对方设备解密组密钥并执行更新。组密钥的使用使得能够减少数据传输所需的通信成本，并且当组密钥被更新时，甚至还没有从基站接收组密钥的移动设备可以稍后从组中接收组密钥基站或属于同一组的另一移动设备。

2. 发明申请

WO2013009061A3 METHOD AND APPARATUS FOR UPDATING A GROUP KEY IN A WIRELESS COMMUNICATION SYSTEM 审中-公开
标题翻译：在无线通信系统中更新组密钥的方法和装置
公开(公告)号：WO2013009061A3
公开(公告)日：2013-04-11
申请号：PCT/KR2012005433
申请日：2012-07-09
申请人： SAMSUNG ELECTRONICS CO LTD , INDUSTRY ACADEMIC COOPERATION FOUNDATION SEOUL UNIVERSITY , SEO SEUNG WOO , PAEK YOUNG HOON , JE DONG HYUN , SUH KYUNG JOO , CHOI SUNG HO , BAE BEOM SIK , BAEK YOUNG KYO , JEONG SANG SOO
发明人： SEO SEUNG WOO , PAEK YOUNG HOON , JE DONG HYUN , SUH KYUNG JOO , CHOI SUNG HO , BAE BEOM SIK , BAEK YOUNG KYO , JEONG SANG SOO
IPC分类号： H04L9/06
CPC分类号： H04L9/0891 , H04L9/0836 , H04L63/064 , H04L63/065 , H04L2209/601 , H04W12/02 , H04W12/04
摘要： The present invention relates to a method and apparatus for updating a key for encrypting multicast data in a wireless communication system. The method of the present invention is characterized by comprising: an information receiving step of receiving information on a group entry time and a group exit time from users who have newly entered an arbitrary group including at least one subgroup; a grouping step of grouping the users using the information on the group entry time and the group exit time; and a key transmission step of either transmitting, to the newly-entered users, keys related to the group and the subgroups, or updating, for the remaining users of the subgroups, both the key related to the subgroup to which the user exiting the group belongs and the key of the group and then transmitting the updated keys to the users of the subgroups.
摘要翻译：本发明涉及一种在无线通信系统中更新用于加密组播数据的密钥的方法和装置。本发明的方法的特征在于包括：信息接收步骤，从新进入包括至少一个子组的任意组的用户接收关于组进入时间和组退出时间的信息; 分组步骤，使用所述组入口时间和组退出时间的信息对所述用户进行分组; 以及密钥发送步骤，向新进入的用户发送与组和子组相关的密钥，或者为子组的剩余用户更新与用户离开组的子组相关的密钥属于该组的密钥，然后将更新的密钥发送给子组的用户。

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