| 摘要 |
The present invention relates to a method for authenticating the presence of a viewer during a presentation of video content (CT), said method using a system comprising at least a receiver/decoder (RX), a display unit (MON) and a viewer input means (RC), said receiver/decoder (RX) comprising a security module (SM), said method comprising the following steps: - receiving a first signal (S1 ) comprising at least the video content (CT); - displaying the video content (CT) on the display unit (MON); - receiving a second signal (S2) comprising a trigger (TR); - transferring the trigger (TR) to the security module (SM), thus causing said security module (SM) to generate a personalised value (U); - displaying a message (MES) on the display unit (MON), said message (MES) comprising at least part of said personalised value (U) and being designed to provoke the viewer to respond; - generating, in the security module (SM), an expected response (EXP) based on at least part of said personalised value (U); - receiving the viewer's response (REP); - transferring the viewer's response (REP) to the security module (SM); - comparing the viewer's (REP) response with the expected response (EXP) thus producing a result (RES) for said authentication. |
