Patent 7171177 was granted and assigned to Electronics and Telecommunications Research Institute on January, 2007 by the United States Patent and Trademark Office.
Provided is to a communication apparatus and method using a human body as a medium, in which secure/normal data signals are transmitted/received to the inside and outside of a human body respectively, through at least two different frequency channels classified according to a predetermined reference value, to thereby efficiently use a frequency based on a physical characteristic of a channel and increase a data transmission rate while maintaining security.