Device and method for detecting a manipulation of an information signal

A device for detecting a manipulation of an information signal, wherein the information signal includes an information signal component with side information and a further information signal component with main information, the side information being linked to the main information, implemented on hardware and comprising:

• an extractor for extracting an information signal component characteristic for the information signal from the information signal;
• a decryptor for decrypting a reference signal, the reference signal being an encrypted representation of a non-manipulated reference signal component with side information of a reference information signal to acquire a decrypted signal for detecting the manipulation;
• and
• a comparator for comparing the decrypted signal to the information signal component to detect the manipulation of the information signal,
• wherein the information signal is an audio signal, wherein the further information signal component includes audio-spectral values, and wherein the information signal component includes block switching information describing a distribution of short blocks and long blocks within the audio signal.

A device for generating an information signal from an input signal, the input signal including an input signal component and a further input signal component, the further input signal component including main information, and the input signal component including side information linked to the main information, the device implemented on hardware and including:

• an encrypter for encrypting the input signal component to acquire a reference signal;
• and
• an assembler for assembling the input signal component, the further input signal component and the reference signal to generate the information signal, so as to enable a comparator of a receiving/detecting device for comparing the encrypted signal to the reference signal, the reference signal being an encrypted representation of a non-manipulated reference signal component with side information of the reference information signal to detect the manipulation,
• wherein the information signal is an audio signal, wherein the further information signal component includes audio-spectral values, and wherein the information signal component includes block switching information describing a distribution of short blocks and long blocks within the audio signal.

A method for generating an information signal from an input signal, the input signal including an input signal component and a further input signal component, the further input signal component including main information, and the input signal component including side information linked to the main information, configuring at least one processor to perform the functions of:

• encrypting the input signal component to acquire a reference signal;
• and
• assembling the input signal component, the further input signal component and the reference signal to generate the information signal, so as to enable a comparator of a receving detecting device for comparing the encrypted input signal to the reference signal, the reference signal being an encrypted representation of a non-manipulated reference signal component with side information of the reference information signal to detect the manipulation,
• wherein the information signal is an audio signal, wherein the further information signal component includes audio-spectral values, and wherein the information signal component includes block switching information describing a distribution of short blocks and long blocks within the audio signal.

A method for detecting a manipulation of an information signal, wherein the information signal includes an information signal component with side information and a further information signal component with main information, the side information being linked to the main information, configuring at least one processor to perform the function of:

• extracting an information signal component characteristic for the information signal from the information signal;
• decrypting a reference signal, the reference signal being an encrypted representation of a non-manipulated reference signal component with side information of a reference information signal to acquire a decrypted signal for detecting the manipulation;
• and
• comparing the decrypted signal to the information signal component to detect the manipulation,
• wherein the information signal is an audio signal, and wherein the further information signal component includes audio-spectral values, and wherein the information signal component includes block switching information describing a distribution of short blocks and long blocks within the audio signal.

A non-transitory computer-readable storage medium having stored thereon a computer program for performing, when the computer program runs on a computer, a method for generating an information signal from an input signal, the input signal including an input signal component and a further input signal component, the further input signal component including main information, and the input signal component including side information linked to the main information, of the method comprising:

• encrypting the input signal component to acquire a reference signal;
• and
• assembling the input signal component, the further input signal component and the reference signal to generate the information signal, so as to enable a comparator of a receiving detecting device for comparing the encrypted input signal to the reference signal, the reference signal being an encrypted representation of a non-manipulated reference signal component with side information of the reference information signal to detect the manipulation,
• wherein the information signal is an audio signal, wherein the further information signal component includes audio-spectral values, and wherein the information signal component includes block switching information describing a distribution of short blocks and long blocks within the audio signal.

A non-transitory computer-readable storage medium having stored thereon a computer program for performing, when the computer program runs on a computer, a method for detecting a manipulation of an information signal, wherein the information signal includes an information signal component with side information and a further information signal component with main information, the side information being linked to the main information, of the method comprising:

• extracting an information signal component characteristic for the information signal from the information signal;
• decrypting a reference signal, the reference signal being an encrypted representation of a non-manipulated reference signal component with side information of a reference information signal to acquire a decrypted signal for detecting the manipulation;
• and
• comparing the decrypted signal to the information signal component to detect the manipulation,
• wherein the information signal is an audio signal, and wherein the further information signal component includes audio-spectral values, and wherein the information signal component includes block switching information describing a distribution of short blocks and long blocks within the audio signal.