DEVICE AND METHOD FOR DETECTING A MANIPULATION OF AN INFORMATION SIGNAL

摘要

The present invention relates to a device for detecting a manipulation of an information signal, comprising means (101) for extracting an information signal component characteristic for the information signal from the information signal, means (103) for encrypting the information signal component to obtain an encrypted signal, and means (105) for comparing the encrypted signal to a reference signal, wherein the reference signal is an encrypted representation of a non-manipulated reference signal component of a reference information signal to detect the manipulation.