Image Encryption Technique by Using Hybrid Pseudo Random Number Generator: A Review

Abstract

This paper introduces a genetic operations-based encryption scheme and a new hybrid pseudo-random number generator (HPRNG). Based on the linear feedback shift register (LFSR), chaotic asymmetric tent chart, and chaotic logistic map, the new HPRNG is built. To encrypt the picture blocks, the scheme uses XOR and genetic operations (mutation, and multipoint crossover). With the assistance of a pseudorandom bit sequence generated by the HPRNG, the first block of the plain image is encrypted. The subsequent blocks are based on the previous block of the cypher and the operator of XOR. To encrypt colour images and text as well, the scheme can be expanded. The created cypher images have very little correlation with their corresponding plain images and have high entropy values, making redundancies in the image pixel values unpredictable and difficult to detect. Compared to some existing schemes, more about the scheme was found and that the proposed scheme was comparatively safe and successful.