3 papers
cs.CR2009
Breaking a new substitution-diffusion based image cipher using chaotic standard and logistic maps
Chengqing Li, Shujun Li, Kwok-Tung Lo
Recently, an image encryption scheme based on chaotic standard and logistic maps was proposed. This paper studies the security of the scheme and shows that it can be broken with on…
cs.CR2005
Security Problems with Improper Implementations of Improved FEA-M
Shujun Li, Kwok-Tung Lo
This paper reports security problems with improper implementations of an improved version of FEA-M (fast encryption algorithm for multimedia). It is found that an implementation-de…
cs.MM2005
On the Design of Perceptual MPEG-Video Encryption Algorithms
Shujun Li, Guanrong Chen, Albert Cheung +2
In this paper, some existing perceptual encryption algorithms of MPEG videos are reviewed and some problems, especially security defects of two recently proposed MPEG-video percept…