Paper 2011/184
Fortification of AES with Dynamic Mix-Column Transformation
Ghulam Murtaza, Azhar Ali Khan, Syed Wasi Alam, and Aqeel Farooqi
Abstract
MDS Matrix has an important role in the design of Rijndael Cipher and is the most expensive component of the cipher. It is also used as a perfect diffusion primitive in some other block ciphers. In this paper, we propose a replacement of Mix Column Transformation in AES by equivalent Dynamic Mix Column Transformation. A Dynamic Mix Column Transformation comprises dynamic MDS Matrices which are based on default MDS Matrix of AES and m-bit additional key. Here m is a variable length that does not exceed the product of 31.97 and one less the number of encryption rounds. This mechanism increases a brute force attack complexity by m-bit to the original key and enforces the attackers to design new frameworks for different modern cryptanalytic techniques applicable to the cipher. We also present efficient implementation of this technique in Texas Instrument’s DSP C64x+ with no extra cost to default AES and in Xilinx Spartan3 FPGA with no change in AES throughput. We also briefly analyze the security achieved over it.
Metadata
- Available format(s)
-
PDF
- Category
- Secret-key cryptography
- Publication info
- Published elsewhere. Unknown where it was published
- Keywords
- Dynamic Mix-Column Transformation (DMCT)Dynamic MDS MatrixKeyed AES DiffusionAttacks on Block CiphersAES performance in DSPAES performance in FPGA.
- Contact author(s)
- azarmurtaza @ hotmail com
- History
- 2011-04-12: received
- Short URL
- https://ia.cr/2011/184
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2011/184,
author = {Ghulam Murtaza and Azhar Ali Khan and Syed Wasi Alam and Aqeel Farooqi},
title = {Fortification of {AES} with Dynamic Mix-Column Transformation},
howpublished = {Cryptology {ePrint} Archive, Paper 2011/184},
year = {2011},
url = {https://eprint.iacr.org/2011/184}
}