This study presents a novel multilayer cryptographic security scheme that integrates RSA (Rivest-Shamir-Adleman) and AES (Advanced Encryption Standard) encryption techniques into a unified security system. RSA, a public-key encryption method, relies on the computational difficulty of factoring large integers, while AES, a symmetric-key encryption scheme, excels in securing large datasets with speed and efficiency.

By combining these methods, the proposed hybrid system leverages the strengths of both algorithms: RSA for securely exchanging symmetric keys or handling smaller data sets, and AES for efficiently encrypting large volumes of data. Layering RSA encryption with AES enhances security by diversifying cryptographic primitives, making attacks significantly more challenging by requiring adversaries to compromise both public-key and symmetric-key algorithms.

The study evaluates the security, computational performance, and practicality of this approach by testing it against well-known threats, including Man-in-the-Middle (MitM) and Side-Channel attacks. Findings demonstrate that the layered combination of RSA and AES creates a robust and resilient security model, offering practical solutions for modern cryptographic challenges.