Cryptography

Key (lock)

CHAOS (operating system)

Algorithm

Image (mathematics)

Plaintext-aware encryption

Encryption

Artificial intelligence

Chaotic

Computer science

Probabilistic encryption

Theoretical computer science

Computer security

Deterministic encryption

Cryptosystem

International Journal of Information Security

Chaos-based cryptosystems have been an active area of research in recent years. Although these algorithms are not standardized like AES, DES, RSA, etc., chaos-based cryptosystems like Chebyshev polynomials can provide additional security when used with standard public key cryptosystems like RSA and El-gamal. Standard encryption algorithms such as AES have always been the primary choice, but when it comes to image or video encryption, many researchers recommend chaos-based encryption techniques due to their computational efficiency. This paper presents a survey on the most up-to-date chaos-based image encryption techniques and classifies them into spatial, temporal and spatiotemporal domains for better understanding. The significant improvements in the field of image encryption are discussed. In addition, comparative analysis is performed to validate the evaluation matrices for quantifying the encryption algorithms’ security and performance in recent papers.

Survey on image encryption techniques using chaotic maps in spatial, transform and spatiotemporal domains