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Encrypted data digital pay television transmission having first modulation random calculation numbers transmitted second module recovering random numbers and new values message generated.
Encrypted data digital pay television transmission having first modulation random calculation numbers transmitted second module recovering random numbers and new values message generated.
The transmission between a first (25) and second module (26) has a calculation (35) of random numbers. The value is transmitted to the second module (38). In the second module the random numbers are recovered (32) and a new value generated (30). Values of the message parts (M) are then found.
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