Designing a New Hybrid Cryptographic Model

Abstract

With the rapid development of technology, one of the most important requirements in today's systems is the reliable transfer of information and confidentiality. Thus, military, electronics, banking systems and many other places have become the fields of use of cryptography science. Cryptology methods are used to solve these problems. In this study, a new poly-alphabetic substitution cipher is designed using the coordinate axes. This hybrid method is a mix of the Polybius square cipher and the Vigenère cipher, reinforced with the RSA cryptography algorithm. There are multiple points for a letter in the coordinate axis and there is randomness in the calculation of these points, so the proposed method is a strong encryption method that is difficult to decode.