A METHOD OF PROTECTING DATA DOWNLOADED FROM A SERVER COMPUTER TO A CLIENT COMPUTER AND A SERVER FOR PROVIDING ACCESS TO DATA SETS IN A PROTECTED FORM

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.