A Novel Dynamic Secret key Generation for an Efficient Image Encryption Algorithm

Abstract

Today, the security of digital images is considered a significant essential and a strong secret key plays a major role in the image encryption. In this paper, a novel method for generating dynamic non-linear secret keys for a symmetric block cipher using XOR-operation is proposed. The dynamic non-linear secret keys generation is based on a combination of logistic and piecewise chaotic map methods with a new automatic creation of initial seed values. The automatic initial seed values creation depends on the development of a novel strategy for seeds creation based on sunflower spiral points. The experimental results indicate that the proposed key generator algorithm has the advantage of large key space with a safety protection of brute force attack. Therefore, the performance analysis of image encryption reveals a correlation coefficient of about (-0.0001) and entropy greater than (7.9978). Furthermore, the results show high security for encryption based on strong dynamic secret key properties.

Efficient Image Encryption Approach Based on Chaos Technique

“…An efficient image encryption approach is achieved through correlation coefficient approach to zero and entropy approach to eight. So, high security and strong dynamic secret key are achieved [32].…”