RGB image encryption using hyper chaotic system

In the modern digital era, the storage of digital data in multi-users systems and transmission over the internet is prime important in the society. The cryptographic technique is one of the possible solutions for protecting digital information for unauthorized uses. In this technique, the encryption algorithm should be simple to design and implementation. In the proposed article, a novel color image encryption algorithm is presented employing a 4D Lorenz system. The encryption technique is very sensitive to the input 256 bits key and input plane image. Initially, the color image is split into three different channels R, G, and B. Next each channel is encrypted separately by employing diffusion and confusion mechanism. Finally, all three channels R, G, and B are combined to produce the required encrypted image. Various security tests have been conducted to prove the validity of the presented encryption technique. The encryption time was considerably less as compared to other reported works.