  Security vulnerabilities demonstrated in implantable medical devices have
opened the door for research into physically secure and low power communication
methodologies. In this study, we perform a comparative analysis of commonly
used ISM frequency bands and human body communication (HBC) for data transfer
from in-body to out-of-body (IBOB). We develop a figure of merit (FoM) that
comprises of the critical parameters to quantitatively compare the
communication methodologies. We perform finite-element method (FEM)-based
simulations and experiments to validate the FoM developed.
