Implementation of Image Encryption based on Chaos-IWT– An Image security

Nowadays, digital image communication through internet has become essential in public network as images can give a clear vision than describing something through text. Data such as medical images, military images, etc. which are highly prone to intruders are mandatory to be maintained confidential to transmit and receive data safely without being intruded by unauthorised persons. This technique can be provided by encrypting these digital images through cryptographic techniques. The proposed image encryption is performed in the transform domain, where Integer Wavelet Transform is adopted to separate the image into approximation coefficients and detailed coefficients. In IWT, most of the significant pixels are in the low-frequency band where confusion and diffusion is performed with chaotic logistic keys. The experimental results achieved entropy of 7.97 and near-zero correlation to verify it is able to resist any statistical attacks.