| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve transmission and reception of voice data readily between specific users, by using a simple function in an environment where there are unspecified number of users. <P>SOLUTION: A voice data transmission side terminal 1 generates a random number in the non-audible range of human by a random number generation function 2-1, and encrypts the target voice data by a voice data encryption function 2-2 by using the random number as a common key. A speaker 3-2 outputs a sound wave having the random number as a frequency in the silent part, and outputs the voice data encrypted as a sound wave. A voice data reception side terminal 10 encodes the voice input from a microphone 11-1 by an encode function 11-2, and takes out the sampling frequency and the common key (decryption key). A voice data decryption function 12-1 decrypts the encrypted voice thus input using the sampling frequency and the decryption key, before being output from a speaker 13-2. <P>COPYRIGHT: (C)2013,JPO&INPIT |
