发明名称 |
COPY PROTECTION OF DATA |
摘要 |
A copyright protection scheme is provided in which data is downloaded from a server (1), typically over the World Wide Web (2) to a client (3), 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 unauthorised copying. |
申请公布号 |
EP0970411(B1) |
申请公布日期 |
2002.05.15 |
申请号 |
EP19980909661 |
申请日期 |
1998.03.18 |
申请人 |
BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY |
发明人 |
BRAMHILL, IAN, DUNCAN;SIMS, MATTHEW, ROBERT, CHARLES |
分类号 |
G06F1/00;G06F21/10;H04L29/06;(IPC1-7):G06F1/00 |
主分类号 |
G06F1/00 |
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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