Abstract

Protecting patient privacy and medical records is a legal requirement. Traditional encryption methods fall short of handling the large volume of medical image data and their peculiar statistical properties. In this paper, we propose a generic medical image encryption framework based on a novel arrangement of two very efficient constructs, dynamic substitution boxes (S-boxes) and chaotic maps. The arrangement of S-box substitution before and after chaotic substitution is shown to successfully resist chosen plaintext and chosen ciphertext attacks. Special precautions are taken to fend off the reset attack against pseudorandom number generators. We show how to implement the generic framework using any key-dependent dynamic S-box construction method and any chaotic map. Experimental results show that the proposed framework successfully passes all security tests regardless of the chaotic map used for implementation. Based on speed analysis, we recommend the use of the classical Baker map or Henon map to achieve encryption throughput approaching 90 MB/s on a modern PC without hardware acceleration.

Highlights

  • The rapid development in networking and communication technology has led to significant advancement in multimedia and digital image communication

  • Results show that the proposed framework achieves stronger security level and enhanced speed compared to existing medical image encryption schemes

  • WORK we present necessary background on the uses of dynamic key-dependent substitution boxes (S-boxes) and chaotic maps in image encryption schemes and review related medical image encryption schemes proposed in literature

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Summary

INTRODUCTION

The rapid development in networking and communication technology has led to significant advancement in multimedia and digital image communication. S. Ibrahim et al.: Framework for Efficient Medical Image Encryption Using Dynamic S-Boxes and Chaotic Maps. We take advantage of two of the most efficient encryption constructs, S-boxes and chaotic maps to propose a generic framework for medical image encryption. Results show that the proposed framework achieves stronger security level and enhanced speed compared to existing medical image encryption schemes. We show how the proposed framework can be adapted to take advantage of future efficient chaotic maps and key-dependent S-box construction methods. The rest of the paper is organized as follows: Section 2 surveys existing medical image encryption schemes and covers in brief the necessary background and related work on dynamic key-dependent S-box construction techniques and image encryption schemes using chaotic maps.

AND RELATED WORK
PERFORMANCE ANALYSIS
DIFFERENTIAL ANALYSIS
KEY SENSITIVITY ANALYSIS
COMPUTATIONAL SPEED ANALYSIS
PERFORMANCE COMPARISON
CONCLUSION AND FUTURE WORK
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