ABSTRACT
Information security is an important matter, especially with the increased demand for information due to the advent of the Internet, as this information has entered many scientific, commercial, and military fields, and this has become widely circulated as the need to protect this information from penetration has arisen by developing techniques to encrypt and preserve information. In this research, a system based on mixing was developed, taking advantage of the strengths of both algorithms, to ensure information protection and more reliability, and to add an additional level of security, where the modified symmetric encryption algorithm, which works with the public key AES, was combined with the modified asymmetric encryption algorithm, which works with the private key, RSA algorithm. In the AES algorithm, there was an increase in speed and a new security prefix by adding Four-S Boxes to the generation key, as well as adding Four-S Boxes to the encryption algorithm to increase the computational complexity of the difficulty of breaking by the attacker. In the RSA algorithm, an additional level of security was added to the modified algorithm by increasing the complexity of (n), which depends on the values of the initial numbers (p, q), in addition to adding other layers of complexity by calculating the value of e. Among the most prominent findings of the study is that hybrid algorithm(AES+RSA), compared with previous studies, has a high level of security, strength, and speed at the time of encryption and decryption, as this hybrid system algorithm was faster than the RSA algorithm and slightly slower than the AES algorithm, as the throughput was high compared to other studies.
Keywords: Cryptography, Cryptography Algorithms, Mixing AES and RSA, Execution Time, Throughput
