Real-time temporal audio watermarking for mobile communication

Abstract

The world around us changes and digital is entering in all aspects of our lives. One aspect that is on the verge of changing is the ‘analog’ signed paper contracts. A lot of contracts are made over telephone nowadays and the audio recording of the discussion about the agreement it can be seen as a ‘digital’ contract. One problem arises, the authenticity of the recording. One side of the contract may rule later that the recording has been tampered and a ‘no’ or a ‘yes’ has been deleted or replaced. In this paper a watermarking algorithm is proposed for obtaining audio recordings which can be 100% proven as authentic or fake. This way no side of an over phone agreement can argue that the recording is altered. A simple check will prove 100% the authenticity of the recording. This way, cut and paste edits of more than 5 ms are easily detected.