| 摘要 |
The invention relates to a method of transmitting at least one complementary datum D in a list of control words CWi for access to a scrambled content transmitted by a content server of an operator of user equipment (2) comprising a reception terminal (4) associated with a security processor (6), each control word CWi from said list being intended to unscramble said content during a specific crypto-period, said method comprising the following steps: a) first, replacing at least one of the control words from said list by a quantity X resulting from the processing of said complementary datum D by a function G having a dual function H, and, upon receipt of said list by the receiving terminal (4), b) recovering said complementary datum D by processing the said quantity X by the dual function H. |
