Cryptanalysis of an image encryption scheme based on the Hill cipher
Cheng-qing Li, Dan Zhang, Guanrong Chen · Journal of Zhejiang University. Science A · 2008
This paper studies the security of an image encryption scheme based on the Hill cipher (Ismail et al. , 2006) and reports its following problems: (1) There is a simple necessary and sufficient condition that makes a number of secret keys invalid; (2) It is insensitive to the change of the secret key; (3) It is insensitive to the change of the plain-image; (4) It can be broken with only one known/chosen plaintext; (5) It has some other minor defects. The proposed cryptanalysis discourages any use of the scheme in practice.