发明授权
- 专利标题： Method for managing key in multimedia broadcast and multicast service
- 专利标题（中）： 多媒体广播和组播业务密钥管理方法
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申请号： US11667909申请日： 2005-11-16
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公开(公告)号： US07903821B2公开(公告)日： 2011-03-08
- 发明人: Yanmin Zhu , Hong Wang , Xiaoqiang Li
- 申请人： Yanmin Zhu , Hong Wang , Xiaoqiang Li
- 申请人地址： KR CN Beijing
- 专利权人： Samsung Electronics Co., Ltd,Beijing Samsung Telecom R&D Center
- 当前专利权人： Samsung Electronics Co., Ltd,Beijing Samsung Telecom R&D Center
- 当前专利权人地址： KR CN Beijing
- 代理机构： The Farrell Law Firm, P.C.
- 优先权： CN200410092587 20041116
- 国际申请： PCT/KR2005/003880 WO 20051116
- 国际公布： WO2006/054860 WO 20060526
- 主分类号： H04L9/08
- IPC分类号： H04L9/08
摘要：
A method for managing key in Multimedia Broadcast/Multicast service comprising steps of defining a valid MTK ID interval for each generated MSK and sends it to a UE along with a MSK by a BMSC; after receiving the MSK, saving a valid MTK ID interval of the MSK by the UE; and defining a MTK ID for each generated MTK encrypted with the MSK and sending the MTK ID and the MTK to the UE after encrypting them with the MSK by the BMSC This MSK is valid only when the transmission of the MTK within MTK ID interval is in operation. Therefore, once the UE finds out that some newly received MTK's MTK ID is beyond said MTK ID, it deletes the MSK that is applied in said MTK transmission's encryption correspondingly.