| 发明名称 |
DATENKOPIERSCHUTZ |
| 摘要 |
A copyright protection scheme downloads data from a server, typically over the World Wide Web to a client for presentation to a user. The downloaded data is cryptographically protected, by encryption and hashing. When displayed by the client, storing and copying functions are selectively disabled in respect of the data, in order to prevent unauthorized copying. |
| 申请公布号 |
DE69805403(T2) |
申请公布日期 |
2002.12.05 |
| 申请号 |
DE1998605403T |
申请日期 |
1998.03.18 |
| 申请人 |
BRITISH TELECOMMUNICATIONS P.L.C., LONDON |
发明人 |
BRAMHILL, DUNCAN;SIMS, ROBERT |
| 分类号 |
G06F12/14;G06F1/00;G06F9/06;G06F12/00;G06F13/00;G06F21/00;G06F21/10;G06F21/22;G06F21/24;G09C5/00;H04L9/00;H04L9/32;H04L12/22;H04L12/54;H04L12/58;H04L29/06;(IPC1-7):G06F1/00 |
主分类号 |
G06F12/14 |
| 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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