The Advanced Encryption Standard (AES) is widely regarded as a robust encryption algorithm, ensuring secure communication and data protection. However, physical vulnerabilities such as side-channel attacks (SCAs) pose a significant threat to its implementations. This paper investigates various types of SCAs, including power analysis and electromagnetic analysis, and explores countermeasures like masking techniques to enhance AES resilience. The study includes an implementation of AES in Vivado using Verilog and a detailed analysis of masked and unmasked designs to validate the effectiveness of proposed countermeasures.