A Combination of Two-Dimensional Hénon Map and Two-Dimensional Rational Map as Key Number Generator

Random numbers are utilised principally to create random strings or secure secret keys. The key is a very important part of encryption and depends on the strength and security in the encryption algorithm. Random number generators have used in a computer simulation, cryptography, statistical modelling, randomised design, and other areas where the production of an unexpected result is desirable. This paper aims to provide designing a new random key generator form on a concatenation between Two- Dimensional Hénon map and Two-Dimensional rational Map. The basic process of the proposed generator is to convert the output of the two chaotic maps into 64-bit numbers and to merge them with the XOR operation and other operations. The key resulted random sequences are studied by the NIST test group and also using the traditional statistical methods.