4 research outputs found
A Differential Cryptanalysis of Yen-Chen-Wu Multimedia Cryptography System (MCS)
At ISCAS'2005, Yen et al. presented a new chaos-based cryptosystem for
multimedia transmission named "Multimedia Cryptography System" (MCS). No
cryptanalytic results have been reported so far. This paper presents a
differential attack to break MCS, which requires only seven chosen plaintexts.
The complexity of the attack is O(N), where is the size of plaintext.
Experimental results are also given to show the real performance of the
proposed attack.Comment: 22 pages, 5 figure
Cryptanalysis of an Image Scrambling Scheme without Bandwidth Expansion
Recently, a novel image scrambling (i.e., encryption) scheme without bandwidth expansion was proposed based on two-dimensional (2-D)discrete prolate spheroidal sequences (DPSS). This paper gives a comprehensive cryptanalysis of the image scrambling scheme, and draw a conclusion that it is not sufficiently secure against various cryptographical attacks, including ciphertext-only attack, known/chosen-plaintext attack and chosen-ciphertext attack. The cryptanalytic results suggest that the image scrambling scheme can only be used to realize perceptual encryption, instead of provide content protection for digital images
Cryptanalysis of an Image Scrambling Scheme without Bandwidth Expansion
Recently, a novel image scrambling (i.e., encryption) scheme without bandwidth expansion was proposed based on two-dimensional (2-D) discrete prolate spheroidal sequences (DPSS). This paper gives a comprehensive cryptanalysis of the image scrambling scheme, and draw a conclusion that it is not sufficiently secure against various cryptographical attacks, including ciphertext-only attack, known/chosen-plaintext attack and chosen-ciphertext attack