发明名称 |
COMMUNICATION SYSTEM, COMMUNICATION DEVICE, COMMUNICATION METHOD, AND COMPUTER PROGRAM |
摘要 |
Content is transmitted in an appropriate usage range for a user while the number of devices simultaneously transmitting content is limited. A content usage device periodically transmits, by means of a command, a key ID which corresponds to an exchange key. A content provision device holds the corresponding exchange key only for as long as the key ID can be received in each specified reception period. The content provision device discards the corresponding exchange key when the key ID can no longer be periodically received. Thereafter, when a command including the key ID is received, a response including information indicating that the exchange key is invalid is returned. |
申请公布号 |
WO2012014566(A1) |
申请公布日期 |
2012.02.02 |
申请号 |
WO2011JP62739 |
申请日期 |
2011.06.02 |
申请人 |
SONY CORPORATION;NAKANO, TAKEHIKO |
发明人 |
NAKANO, TAKEHIKO |
分类号 |
H04L9/08;G06F21/24 |
主分类号 |
H04L9/08 |
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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