发明名称 |
Information providing system |
摘要 |
An information providing system comprises an encryption unit for encrypting content data using a first key. The first key is included in message data which is associated with the content data and is separately transmitted to a user site. The message data is also encrypted using a second key within a security module. The second key is further encrypted using a third key within the security module. The third key is never read out to the outside of the security module. |
申请公布号 |
EP1931106(A2) |
申请公布日期 |
2008.06.11 |
申请号 |
EP20080001937 |
申请日期 |
1998.04.30 |
申请人 |
PANASONIC CORPORATION |
发明人 |
MURATANI, HIROFUMI |
分类号 |
G06F21/22;H04L29/06;G06F1/00;G06F21/00;G09C1/00;H04L9/08;H04L9/10;H04L9/14;H04M3/42 |
主分类号 |
G06F21/22 |
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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