Paper 2017/1031
Lightweight Design Choices for LED-like Block Ciphers
Sumanta Sarkar, Habeeb Syed, Rajat Sadhukhan, and Debdeep Mukhopadhyay
Abstract
Serial matrices are a preferred choice for building diffusion layers of lightweight block ciphers as one just needs to implement the last row of such a matrix. In this work we analyze a new class of serial matrices which are the lightest possible $4 \times 4$ serial matrix that can be used to build diffusion layers. With this new matrix we show that block ciphers like LED can be implemented with a reduced area in hardware designs, though it has to be cycled for more iterations. Further, we suggest the usage of an alternative S-box to the standard S-box used in LED with similar cryptographic robustness, albeit having lesser area footprint. Finally, we combine these ideas in an end-end FPGA based prototype of LED. We show that with these optimizations, there is a reduction of $16% $ in area footprint of one round implementation of LED.
Metadata
- Available format(s)
-
PDF
- Publication info
- Published elsewhere. Indocrypt 2017
- Keywords
- MDS matrixSerial matrixRecursive Diffusion LayerLightweightS-boxLED
- Contact author(s)
- sumanta sarkar @ gmail com
- History
- 2017-10-28: received
- Short URL
- https://ia.cr/2017/1031
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2017/1031,
author = {Sumanta Sarkar and Habeeb Syed and Rajat Sadhukhan and Debdeep Mukhopadhyay},
title = {Lightweight Design Choices for {LED}-like Block Ciphers},
howpublished = {Cryptology {ePrint} Archive, Paper 2017/1031},
year = {2017},
url = {https://eprint.iacr.org/2017/1031}
}
