Method for the transmission of management data
First Claim
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1. A method, comprising:
- transmitting management data to at least one multimedia unit or a group of multimedia units in a form of at least three authorization messages, at least two of said at least three authorization messages including an identical content and at least two of said at least three authorization messages including non-identical contents, said at least three authorization messages being encrypted by at least one synchronization key,cyclically repeating the transmission of said at least three authorization messages such that the transmission of two authorization messages including the identical content is separated by the transmission of at least one authorization message including the non-identical content, said at least three authorization messages being intended for said multimedia unit or said group of multimedia units, andmodifying the at least one synchronization key at least between two consecutive cycles.
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Abstract
This invention relates to a method for the transmission of management data to at least one multimedia unit or a group of multimedia units. This method is characterized in that said management data is sent in the form of at least one authorization message encrypted by means of at least one synchronization key (SK), the sending of said at least one authorization message being repeated cyclically and intended for said multimedia unit or said group of multimedia units, and in that the synchronization key is modified at least during each cycle.
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19 Claims
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1. A method, comprising:
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transmitting management data to at least one multimedia unit or a group of multimedia units in a form of at least three authorization messages, at least two of said at least three authorization messages including an identical content and at least two of said at least three authorization messages including non-identical contents, said at least three authorization messages being encrypted by at least one synchronization key, cyclically repeating the transmission of said at least three authorization messages such that the transmission of two authorization messages including the identical content is separated by the transmission of at least one authorization message including the non-identical content, said at least three authorization messages being intended for said multimedia unit or said group of multimedia units, and modifying the at least one synchronization key at least between two consecutive cycles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification