A plaintext-related image encryption algorithm based on chaos

• Published in: Multimedia tools and applications Vol. 77; no. 6; pp. 6647 - 6669
• Main Authors: Zhang, Yong, Tang, Yingjun
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.03.2018; Springer Nature B.V
• Subjects: Communications systems; Computer Communication Networks; Computer Science; Computer simulation; Data Structures and Information Theory; Encryption; Entropy (Information theory); Multimedia Information Systems; Public Key Infrastructure; Sensitivity; Special Purpose and Application-Based Systems; Image encryption; Piecewise linear chaotic map; Plaintext-related scrambling; Identical encryption and decryption algorithm; Security analysis
• ISSN: 1380-7501; 1573-7721
• DOI: 10.1007/s11042-017-4577-1

A symmetric key image cryptosystem based on the piecewise linear map is presented in this paper. In this cryptosystem, the encryption process and the decryption process are exactly same. They both include the same operations of plaintext-related scrambling once, diffusion twice and matrix rotating of 180 degrees four times. The length of secret key in the system is 64 d where d is a positive integer. The proposed system can fight against the chosen/known plaintext attacks due to the using of plaintext-related scrambling. The simulate results and comparison analysis show that the proposed system has many merits such as high encryption/decryption speed, large key space, strong key sensitivity, strong plaintext sensitivity, strong cipher-text sensitivity, good statistical properties of cipher images, and large cipher-text information entropy. So the proposed system can be applied to actual communications.