Integritätsschutz von Audiodaten

Over the past decades, digitization has had a significant impact on our working environment. This is mainly due to developments within the information technology and computer industry. However, since digital signals are easy to edit and thus easy to manipulate, it is of considerable interest to ensure the integrity of such data. In this sense, the technique of digital content-sensitive watermarks, which originated in steganography, can be used. The aim of this method is to extract certain content-describing features, to represent them in numerical form and then to embed them in the data stream in the form of pseudo-noise. By comparing the information introduced and the newly calculated feature, a qualitative statement can now be made as to whether a file has been modified.