کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
759232 | 896469 | 2010 | 14 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A chaotic block cipher algorithm for image cryptosystems A chaotic block cipher algorithm for image cryptosystems](/preview/png/759232.png)
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 plainimage to 256-bits of cipherimage 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 images with superior performance speed than other schemes. The security analysis of the new scheme confirms a high security level and fairly uniform distribution.
Journal: Communications in Nonlinear Science and Numerical Simulation - Volume 15, Issue 11, November 2010, Pages 3484–3497