Encryption method and security analysis of medical images based on stream cipher enhanced logical mapping
Shuang Liu1, Li Liu2, Ming Pang3
1School of Computer and Information Engineering, Harbin University of Commerce, Harbin, Heilongjiang 150080, China.
Summary
This study introduces a novel stream cipher enhanced logic mapping encryption method for improved medical image security. The method demonstrates excellent encryption performance, as validated by rigorous evaluation metrics.
Area of Science:
- Medical imaging
- Cryptography
- Information security
Background:
- Growing importance of medical image security in healthcare.
- Need for advanced encryption techniques to protect sensitive patient data.
Purpose of the Study:
- To propose a stream cipher enhanced logic mapping encryption method for higher medical image security.
- To leverage chaotic maps and logical mapping for robust encryption.
Main Methods:
- Utilizing stream cipher theory to generate encryption keys via Chebyshev map.
- Implementing pre-chaos processing with coded initial values.
- Employing chaotic encryption in X and Y dimensions combined with logical mapping.
Main Results:
- Achieved a high National Picture Number Change Rate (NPCR) of 0.9874 for encrypted blood cell images.
- Demonstrated effective encryption of original image information through chaotic processes.
Conclusions:
- The proposed method exhibits excellent encryption performance.
- All evaluation metrics confirm the efficacy and security of the encryption technique.
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