269 citations · 950 across the 10 of their papers we have counts for
10 papers
Cryptanalyzing an image encryption algorithm based on autoblocking and electrocardiography
Chengqing Li, Dongdong Lin, Jinhu Lü +1
This paper analyzes the security of an image encryption algorithm proposed by Ye and Huang [\textit{IEEE MultiMedia}, vol. 23, pp. 64-71, 2016]. The Ye-Huang algorithm uses electro…
On the cryptanalysis of Fridrich's chaotic image encryption scheme
Eric Yong Xie, Chengqing Li, Simin Yu +1
Utilizing complex dynamics of chaotic maps and systems in encryption was studied comprehensively in the past two and a half decades. In 1989, Fridrich's chaotic image encryption sc…
Cryptanalyzing an Image-Scrambling Encryption Algorithm of Pixel Bits
Chengqing Li, Dongdong Lin, Jinhu Lü
Position scrambling (permutation) is widely used in multimedia encryption schemes and some international encryption standards, such as the Data Encryption Standard and the Advanced…
Cracking a hierarchical chaotic image encryption algorithm based on permutation
Chengqing Li
In year 2000, an efficient hierarchical chaotic image encryption (HCIE) algorithm was proposed, which divides a plain-image of size with possible value levels into…
Deciphering a novel image cipher based on mixed transformed Logistic maps
Yuansheng Liu, Hua Fan, Eric Yong Xie +2
Since John von Neumann suggested utilizing Logistic map as a random number generator in 1947, a great number of encryption schemes based on Logistic map and/or its variants have be…
Cryptanalyzing a class of image encryption schemes based on Chinese Remainder Theorem
Chengqing Li, Yuansheng Liu, Leo Yu Zhang +1
As a fundamental theorem in number theory, the Chinese Reminder Theorem (CRT) is widely used to construct cryptographic primitives. This paper investigates the security of a class…
Breaking a novel image encryption scheme based on improved hyperchaotic sequences
Chengqing Li, Yuansheng Liu, Tao Xie +1
Recently, a novel image encryption scheme based on improved hyperchaotic sequences was proposed. A pseudo-random number sequence, generated by a hyper-chaos system, is used to dete…
Breaking a chaotic image encryption algorithm based on modulo addition and XOR operation
Chengqing Li, Yuansheng Liu, Leo Yu Zhang +1
This paper re-evaluates the security of a chaotic image encryption algorithm called MCKBA/HCKBA and finds that it can be broken efficiently with two known plain-images and the corr…
Breaking a novel colour image encryption algorithm based on chaos
Chengqing Li, Yu Zhang, Rong Ou +1
Recently, a colour image encryption algorithm based on chaos was proposed by cascading two position permutation operations and one substitution operation, which are all determined…
Cryptanalyzing a chaos-based image encryption algorithm using alternate structure
Yu Zhang, Chengqing Li, Kwok-Wo Wong +2
Recently, a chaos-based image encryption algorithm using alternate structure (IEAS) was proposed. This paper focuses on differential cryptanalysis of the algorithm and finds that s…