Topological Graphic Passwords Made By A Type Of Module-k Graph Labellings

Passwords are especially ubiquitous in authentication systems.Although a lot of research has concentrated on the analysis of passwords.Graphic password has been widely used in mobile devices and other fields,and it is facing a good opportunity for development since QR code is welcomed in the world.Graphic passwords are another way for alternative text-based passwords and to improve the user account security.Graphic password has been verified as a reliable authentication scheme for text passwords.Psychological studies show that human beings can remember images more easily than text,so graphic passwords are easy to remember and difficult to guess.However,almost all graphic passwords techniques are vulnerable to attack because of their graphic properties.Graphic password ensures confidentiality,data integrity,non-repudiation,access control and authentication.In the data age,the development of graphic password has raised a variety of new problems.Here propose a new graphic password(Topsnut-gpw)based on the idea of "topological structure plus number theory" and various labellings for designing graphic password-s.Therefore,we propose a class of module-k labellings,which is used to generate Topsnzt-gpws of algebraic groups,which are called graph groups.Topsnut-gpws is dif-ferent from the existing graphic password,it can be saved in the computer by matrix.According to the following principles,we design the information security password graph:(1)it is convenient to use it in general;(2)it is safe,that is,it is not easy to be broken;(3)there are enough graphics and labels to make the required key and lock.Some techniques in graph theory are used to obtain text passwords from topological graph passwords and to encrypt electronic files with these text passwords.