Importance

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Abstract

A method for controlling access by a secret key K to a scrambled digital content distributed, along with the security data D(K) calculated on the basis of K, by an operator equipped with a content server and an access-rights server to at least one receiving terminal comprising a plurality of access-control modules, each access-control module implementing a specific technology for determining the secret key K. The rights server prior to distribution incorporates into said security data D(K) a selection criterion for selecting an access-control module from among the plurality of the terminal's access-control modules to process said security data D(K), after which when one of said access-control modules receives said security data D(K), said access-control module analyses the data D(K) to obtain said selection criterion and, on the basis of its value, terminates processing the data D(K) in order to attempt to obtain the secret key K or transmits a portion or the entirety of said security data D(K) to at least one of the other access-control modules.

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First Claim