Comments on a cryptosystem proposed by Wang and Hu

Abstract

In this paper, we analyze a new proposal for a knapsack-type cryptosystem, recently published by Wang and Hu ([1]), along with two cryptanalyses of it, carried out by Youssef ([2]) and Lee ([3]). The cryptosystem proves to be safe only if the keys have very large sizes, but this severely impacts the use of the system from a practical point of view. © 2013 Springer-Verlag Berlin Heidelberg.