A chaotic block cipher algorithm for image cryptosystems

作者：Amin Mohamed; Faragallah Osama S; Abd El Latif Ahmed A^*

来源：Communications in Nonlinear Science & Numerical Simulation, 2010, 15(11): 3484-3497.

DOI：10.1016/j.cnsns.2009.12.025

• Image cryptosystems
• Block cipher
• Chaos
• Primitive operations
• Security analysis

Recently, many scholars have proposed chaotic cryptosystems in order to promote communication security However, there are a number of major problems detected in some of those schemes such as weakness against differential attack, slow performance speed, and unacceptable data expansion In this paper. we introduce a new chaotic block cipher scheme for image cryptosystems that encrypts block of bits rather than block of pixels It encrypts 256-bits of plain image to 256-bits of cipher image within eight 32-bit registers The scheme employs the cryptographic primitive operations and a non-linear transformation function within encryption operation, and adopts round keys for encryption using a chaotic system The new scheme is able to encrypt large size of im

• 出版日期2010-11