发明名称 |
Method and apparatus for file sharing between a group of user devices with encryption-decryption information sent via satellite and the content sent separately |
摘要 |
A communication system 100 includes a group of user devices 110, a first satellite 106 and a content delivery network 120 in communication with the group of user devices 110. The content delivery network 120 communicates encryption-decryption information to the plurality of user devices using the first satellite 106 and encrypts the content in response to the encryption-decryption information. The content delivery network 120 communicates the content to the plurality of user devices separately from the encryption-decryption information. The plurality of user devices 110 decrypts the content in response to the encryption-decryption information. A control word packet may also be used to convey security information to the user devices so that decryption may be performed. |
申请公布号 |
US8417939(B2) |
申请公布日期 |
2013.04.09 |
申请号 |
US20070786103 |
申请日期 |
2007.04.11 |
申请人 |
KAHN RAYNOLD M.;KLAUSS PETER M.;THE DIRECTV GOUP, INC. |
发明人 |
KAHN RAYNOLD M.;KLAUSS PETER M. |
分类号 |
H04L29/06 |
主分类号 |
H04L29/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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