| 摘要 |
<p>The invention relates to a method of receiving a multimedia content scrambled with the aid of control words comprising: - the reception (101 a) by a security processor of ECM messages containing at least one cryptogram CW* of a control word CW, - the decryption (110) of this cryptogram CW*, and - the descrambling (110) of a scrambled multimedia content on the basis of the decrypted control word CW, - at least one implementation (114) of a captcha, from a reception terminal, whose correct response is contained in a memory of the processor and varies from one implementation to the other, - the processor acquires (116) at least one response to this captcha and compares (118) this response with the correct response contained in its memory, and - the processor limits (122) the descrambling of the cryptograms CW* if no response to this captcha corresponds to the correct response.</p> |
