Cryptanalysis of Wang et al's Lattice-based Key Exchange Protocol

Publication date: Available online 27 April 2016 Source:Perspectives in Science Author(s): Daya Sagar Gupta, G.P. Biswas Wang et al. proposed a new hard problem on lattices which is an extension of the small integer solution (SIS) on lattices. This new generated hard problem is named to be bilateral in-homogeneous small integer solution (Bi-ISIS). Using the hardness of Bi-ISIS, Wang et al. proposed a new key exchange protocol, which is based on the lattice-based cryptography. In this paper, we signalize that Wang et al's lattice-based key exchange protocol is vulnerable to an attack, namely, man-in-the-middle (MITM) attack. Through this attack, Eavesdropper can intercept the authenticated messages and communicate the unauthentic messages among the communicating parties.

Source: Perspectives in Science - April 27, 2016 Category: Science Source Type: research