CBC And Interleaved CBC Implementations Of PACMA Cryptographic Algorithm
| ||International Journal of Computer Trends and Technology (IJCTT)|| |
|© - October Issue 2013 by IJCTT Journal|
|Volume-4 Issue-10 |
|Year of Publication : 2013|
|Authors :J. John Raybin Jose , E. George Dharma Prakash Raj|
J. John Raybin Jose , E. George Dharma Prakash Raj "CBC And Interleaved CBC Implementations Of PACMA Cryptographic Algorithm"International Journal of Computer Trends and Technology (IJCTT),V4(10):3724-3733 October Issue 2013 .ISSN 2231-2803.www.ijcttjournal.org. Published by Seventh Sense Research Group.
Abstract:- PACMA (Parallelized Adaptive Cipher with Modular Arithmetic) is a Symmetric Cryptographic Algorithm designed with traditional techniques to efficiently utilize the parallel processing capabilities of modern computing systems. It overcomes the performance inconsistencies prevalent in conventional cryptographic algorithms when they are implemented in different computing systems with different processing capabilities. The size of the key and the plain text blocks are each 1024-bits. The adaptive nature of this algorithm is achieved by incorporating flexibility in the size of the key and plain text sub-blocks and the number of rounds. Level of Intra-packet parallelization, variety in grain size and the required security strength are achieved by suitably deciding the sub-block size. Flow of the algorithm is made dynamic by determining the execution steps through each key value at runtime. In spite of these advantages the ECB mode implementation of PACMA always produces the same cipher text block for a particular plain text block when the same key is used. CBC and Interleaved CBC modes with 2-way and 4-way interleaving are employed to alleviate this problem. The performance of the PACMA in ECB, CBC and Interleaved CBC modes are analyzed with implementations in shared memory parallel programming environment using OpenMP, Java Threads and MPI.
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Keywords :— Symmetric Block Cipher, Parallel Adaptive Cryptography, CBC, Interleaved CBC, Modular Arithmetic.