An Implementation of SLICE Algorithm to Enforce Security for Medical Images using DNA Approach

In Today's world, medical diagnostics by tele-communication plays a major role in people life. There brings a need for securing medical data when transmitted over an insecure communication channel. To ensure the confidentiality, integrity and authenticity for the medical images when transmitted, we propose an algorithm named SLICE abbreviated from Scrambling LogIstic Chaotic Encoding to ensure security for the medical documents and images transaction. The input DICOM image is scrambled pixel by pixel and is distributed in an unexplored manner. A random pixel value is obtained from the image by performing splitting and shifting operation. The chaotic map is then applied. The image from chaotic map is then DNA encoded. The DNA encoding performs a masking operation on the pixel value to obtain a binary sequence. The binary sequence is added with the obtained random pixel value. All these phases are reversed to decrypt the encrypted image. Since the key has strong sensitiveness, decoding becomes very difficult- and hence ensures security of patient's medical document. This ensures the algorithm protects patient's medical images. Experimental results have shown that the proposed algorithm maintains a high level of integrity and robustness. The algorithm also provides a promising performance and computational efficiency for securing digital medical encryption using DICOM images.