Abstract
One of the problems in telecommunication fraud investigation is speaker identity tracing and verification. It is difficult to trace identities due to the anonymity of speaker. Therefore the identity tracing of the anonymous user has been identified as a significant problem to assist the investigation. In this paper, a speaker identity tracing scheme using fingerprint data hiding is proposed for preventing telecommunication fraud. First, the fingerprint data of the speaker as the identity information is hidden into the recorded speech signal in the process of calling by smartphone, and then the OFDM of 4G wireless communication is used to modulate the speech signal containing the speaker identity information. Once telecommunication fraud occurs, the speaker can be successfully traced by extracting the fingerprint data from the speech signal. Experimental results show the proposed scheme can accurately trace the speaker identity in the remote speech communications, and prevent telecommunication fraud to some extent.
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