METHOD OF SECURING ENTRY OF AN ALPHANUMERIC CODE ON A COMPUTER SYSTEM, INTERACTION AND DEDICATED DRIVER ENTITY THEREFOR.

摘要

Method of securing entry of an alphanumeric code on a computer system comprising a display screen and a screen based entry device. The screen based entry device is arranged for enabling interaction between said computer system and a user by selecting information displayed on said screen in operation. The method comprises the steps of: an interaction entity providing graphical data to said display screen; displaying one or more alphanumeric characters on said screen based on said graphical data, for selection by said user; and the interaction entity receiving input signals from said entry device, which input signals are indicative of selected characters of said alphanumeric characters. The graphical data comprises screen position data, and the step of displaying comprises displaying said alphanumeric characters on said screen on randomized positions determined by said screen position data. The method further comprises a step of the interaction entity encoding said graphical data prior to providing said graphical data to said display screen such as to prevent unauthorised logging of said graphical data. The invention is further directed to an interaction entity and a dedicated driver entity.