摘要 |
A copyright protection scheme is provided in which data is downloaded from a server <bold>1, </highlight>typically over the World Wide Web <bold>2 </highlight>to a client <bold>3, </highlight>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 to prevent unauthorised copying.
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