.png){kind=icon}
Return
A Fast Chaos-Based Colour Image Encryption Algorithm Using a Hash Function
.png){kind=icon}
PRE
AI
DOI：10.15388/Informatica.2018.186.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
This paper suggests a new fast colour image cipher to meet the increasing demand for secure online image communication applications. Unlike most other existing approaches using a permutation-substitution network, the proposed algorithm consists of only a single substitution part. The keystream sequence is generated from a 4-D hyperchaotic system, whose initial conditions are determined by both the secret key and the SHA-224 cryptographic hash value of the plain-image. Favoured by the avalanche effect of hash functions, totally different keystream sequences will be generated for different images. Consequently, desired diffusion effect can be achieved after only a single round of substitution operation, whereas at least two encryption rounds are required by the state-of-the-art permutation-substitution type image ciphers. We also demonstrate the computational efficiency of the proposed algorithm by comparing it with the AES encryption algorithm. A thorough security analysis is carried out in detail, demonstrating the satisfactory security of the proposed algorithm.
Keywords:
colour image cipher
hyperchaotic system
hash function
XOR encryption
Journal
IF:
2.8
Papers:
402
Citations:
1.0K
Organization
Cited Papers
No cited papers available