Cryptanalysis of three authenticated encryption schemes for wireless sensor networks

Abstract

In this paper we analyse three authenticated encryption schemes, CMBC-MAC, SCMA and CBC-X, which were proposed for wireless sensor networks (WSN). Our research shows that these three schemes all have serious security problems either in authenticity or in privacy. More specifically, we only need one query to break the authenticity of CMBC-MAC and SCMA with success probability of 1. Meanwhile, we only need one query of block length of at least three to break the authenticity of CBC-X with success probability of 0.63, and we need two queries to break the privacy of CBC-X with success probability of 1 - 2 -64.