Patent ID: 9251383
Filing Date: 2016-02-02
CPC Classification: G06F

Claim Text:
1. A system for preventing logging of an on-screen keyboard of a computer, the system comprising: a first transmission interface device connected to a host computer; a pointer device; an encryption module for encrypting and transferring data of said pointer device to said first transmission interface device, the data of said pointer device containing pointer coordinate data and a push-button clicking event by pressing a left key or a middle key or a right key so as to produce a control signal, said encryption module only encrypting the push-button clicking event; a pointer data module configured to obtain and to convert and to save the pointer coordinate data of said pointer device; a push-button data module configured to obtain to convert and to save push-button data of said pointer device; and a physical interface module configured to obtain coordinates of said pointer device and original data of key events, the original data obtained by said physical interface module being converted into the coordinates or the push-button data of said pointer device by said pointer data module and by said push-button data module, said encryption module configured to encrypt and transfer the coordinates or the push-button data in an encrypted form, said pointer device configured to produce clicking events, said encryption module encrypting the push-button clicking event to conceal the clicking event so that an on-screen logging software cannot obtain a trigger point of images capturing the screen of the computer, an encrypted clicking events presented on the screen of the computer such that on-screen logging software cannot obtain images of the encrypted clicking events by capturing images of the screen of the computer so as to prevent logging of the on-screen keyboard of the computer.