Biometric identity verification using intra-body propagation signal

We propose to utilize an electromagnetic wave through a human body as biometrics. The electromagnetic wave (intra-body propagation signal) is generated at a relatively shallow depth in the human body through a pair of electrodes pasted on the human skin. The biological tissue of each individual human being is different from that of others, so that the transfer characteristic of the intra-body propagation signal is also different mutually. By using such a difference, it is expected to authenticate personal identification. In addition, liveness detection can be realized simultaneously using the intra-body propagation signal. It is effective on the detection of spoofing using artificial bodies. In this paper, we examine the individual feature in the intra-body propagation signal based on the spectrum analysis. As a result, the verification rate of 58% is obtained using the similarity of the power spectrum especially in the 30-60 MHz sub-band.