Security

Differential Analysis of the LED Block Cipher

Date Added: Nov 2012
Format: PDF

In this paper, the authors present a security analysis of the lightweight block cipher LED proposed by Guo et al. at CHES 2011. Since the design of LED is very similar to the Even-Mansour scheme, they first review existing attacks on this scheme and extend them to related-key and related-key-cipher settings before they apply them to LED. They obtain results for 12 and 16 rounds (out of 32) for LED-64 and 16 and 24 rounds (out of 48) for LED-128. Furthermore, they present an observation on LED in the related-key-cipher setting. For all these attacks they need to find good differentials for one step (4 rounds) of LED.