This Master's Thesis focuses on the use of Optical Fiber Sensing, highlighting its exceptional efficiency in detecting fiber spoofing attempts. This technique is particularly valuable in high-security environments such as data centers, where preventing hacking attempts is critical. The Thesis is divided into two main sections. The first section explores the characterization of a new type of polarimeter, whose performance was previously unknown. The goal was to evaluate whether this polarimeter could meet the specific requirements of the Thesis while keeping costs manageable. The second section explores the application of theoretical concepts from optical fiber sensing to address the specific challenges posed by this work.