AUTHENTICATION CODE EMBEDDING DEVICE FOR FALSIFICATION DETECTION, FALSIFICATION DETECTION DEVICE, AUTHENTICATION CODE EMBEDDING METHOD FOR FALSIFICATION DETECTION, FALSIFICATION DETECTION METHOD, AND COMPUTER PROGRAM

摘要

PROBLEM TO BE SOLVED: To detect a presence/absence of falsification by adding information for detecting falsification to a digital voice with a low processing load.;SOLUTION: An authentication code embedding device 1 for falsification detection calculates a first authentication code and a second authentication code by encoding waveform data extracted from voice data and predetermined data except a waveform with predetermined confidential information respectively, and adds the authentication codes to the voice data. When extracting the predetermined data removing the waveform data, the waveform data, the first authentication code, and the second authentication code from the voice data, a falsification detection device calculates the first authentication code and the second authentication code by encoding the predetermined data respectively by the predetermined confidential information, compares the first authentication code with the second authentication code set within the voice data, and outputs the result.;COPYRIGHT: (C)2011,JPO&INPIT