Lightweight Format-Compliant Encryption Algorithm for JPEG 2000 Images

The increasing usage of personal multimedia devices such as mobiles phones, smart glasses, etc. has pointed out the need for securing the captured/exchanged images content. Nevertheless, because of the limited resources of these novel platforms on one hand and the voluminous nature of multimedia content on the other hand, preserving multimedia content security remains a research challenge. In this paper, we tackle this issue by presenting a fast format-compliant selective encryption algorithm for JPEG 2000 images. It is based on selectively choosing data from the JPEG 2000 code-stream in a uniformly dynamic-key dependent manner to apply the proposed encryption algorithm. The encryption algorithm consists of two rounds of substitution-diffusion processes, based on a dynamic key, that is changed for every input image. Extensive security analysis has been conducted to evaluate the effectiveness of the proposed scheme. The obtained results have demonstrated the robustness of our algorithm against the most known types of attacks and have shown a significant improvement in term of execution time reduction compared to a similar existing JPEG 2000 images encryption scheme.