R. Tamilselvi ¹, G. Ravindran ²

Affiliations
1 Department of Electronics, Communication Engineering, Sethu Institute of Technology, Kariapatti - 626106, Tamil Nadu, IN
2 Centre for Medical Electronics, Department of Electronics and Communication Engineering, Anna University, Chennai - 60001, Tamil Nadu, IN

Abstract

Objectives: To develop a new image encryption algorithm using logistics map and Radon transform. It aims at finding an optimum transformation technique that gives better encryption in terms of encryption quality and entropy. Methods/ Analysis: A Pseudo Random Bit Generator (PRBG) is used which outputs a sequence of statistically independent and unbiased binary digits. A novel method is developed using PRBG based on logistics maps and radon transform for DICOM image encryption. Encryption is evaluated based on encryption quality and entropy. Findings: The maximum encryption occurs when the angle of rotation is 135. Similarly, the results of entropy value indicate that the there is a higher encryption of 80% for 135 degree of rotation. The key added with the transformed image also increases the randomness and provides authentication of images. Conclusion/Application: Encryption quality and entropy are analyzed for the algorithm and the results are compared. Experimental results confirm that the encryption quality and entropy obtained from the images can clearly discriminate between the original and encrypted images.

Keywords

DICOM, Logistic Map, PRBG, Radon Transform and Block Transform

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