On Space Of Topological Graphic Passwords Based On Chinese Characters

Abstract

Graphical passwords have been applied in a wide range of scientific areas, as well-known, QR code is a successful example of graphical passwords. In this paper, we design a new-type of graphical passwords, called as Hanzi-gpw, which are the abbreviation of Hanzi graphical passwords, that can be use conveniently and have higher level security in information networks by mean of topological structures and colorings/labellings of graph theory. We estimate the space of Hanzi-gpws, and find that it is easy for converting into text-based passwords. But in general, the operation of Hanzi-gpw → text-based password is irreversible, so such property likes that of the Secure Hash Algorithm..