  Physical layer security is a field of study that continues to gain importance
over time. It encompasses a range of algorithms applicable to various aspects
of communication systems. While research in the physical layer has
predominantly focused on secrecy capacity, which involves logical and digital
manipulations to achieve secure communication, there is limited exploration of
directly manipulating electromagnetic fields to enhance security against
eavesdroppers. In this paper, we propose a novel system that utilizes the
Mueller calculation to establish a theoretical framework for manipulating
electromagnetic fields in the context of physical layer security. We develop
fundamental expressions and introduce new metrics to analyze the system's
performance analytically. Additionally, we present three techniques that
leverage polarization to enhance physical layer security.
