Design and Analysis of a Novel Synchronous Stream Cipher Using Secure Pseudo Random Number Generator

The stream ciphers are one of the most important cryptosystem in cryptography and their applications are very diverse, particularly in defense industries and telecommunications. This crypto system is designed based on a key stream and also the key stream is created using a pseudo random number generator. In this paper, first, a new pseudorandom number generator is designed based on discrete logistic map and independency, uniformity and randomness of the generated numbers by proposed pseudo random number generator are tested by correlation test, goodness of fit test and NIST tests. The tests results illustrate suitable quality of proposed generator for cryptographic applications properly. Next, a new synchronous stream cipher algorithm using the proposed pseudo random number generator is designed and simulated. Finally, the algorithm has been tested using three different methods and is compared with some other cryptography algorithms.