POS machine safety PIN input method based on QT framework and storage medium thereof

Abstract

The invention relates to a POS machine security P I N input method based on a QT framework and a storage medium thereof, and the method comprises the steps: drawing an input box through a QLi neEd it control provided by the QT framework, and obtaining key input from an event node by a QWS service for updating the display of the input box; a special vppevent equipment node is set up and used for returning a specific value of the P I N input by a user; in the common input mode, user input is returned to the QT framework through the standard event node; in the P I N input mode, user input is returned to the security service through a special vppevent equipment node; the keypad keyboard driver is additionally provided with a P I N input mode switching interface; in the P I N input mode, the keypad driver judges a key value input by a user, and when the key value input by the user is a function key, the key value is synchronously sent to the event and the vppevent; according to the method and the system, the defect that application isolation cannot be realized by the QT standard input control is overcome, so that the PI data of a user can be processed by using the QT standard input control on a POS (Point Of Sale) on the premise of meeting the PC I safety specification requirement.

Description

technical field [0001] The invention relates to the technical field of POS machine security systems, in particular to a QT frame-based PIN security PIN input method and a storage medium thereof. Background technique [0002] At present, the software systems of traditional POS machines in the industry are mostly built based on the Linux system. Each manufacturer defines its own C language graphical interface programming interface, and develops GUI applications on its own equipment platform. At the same time, the differentiated application programming interfaces of different manufacturers' platforms also bring high learning and migration costs to customers. As a cross-platform C++ graphical user interface application development framework, the QT application development framework has good compatibility with linux and is easy to transplant. Compared with the commonly used C-based process-oriented application programming development framework in the industry, the GUI program de...

AI Technical Summary

Problems solved by technology

However, as a third-party general application development framework, the QT framework does not consider such security requirements in the design of its input box control. Directly using the standard QT framework to implement the input box control will directly expose the user's PIN at the application layer. Does not meet safety requirements

However, if the original security service model is adopted and each manufacturer defines the way to realize the PIN input control, it will cause differences in application development on different manufacturers' platforms and fragmentation of user experience.