A password input method and device thereof

Abstract

The invention discloses a password input method and device. The method achieves the password input function by matching a single password key with progress bars in a display screen. The device comprises a microcontroller and the display screen and further comprises the single key and a man-machine interaction interface circuit. The display screen and the man-machine interaction interface circuit are independently connected with the microcontroller, and the single key is connected with the man-machine interaction interface circuit. When the single key is pressed, a continuous first level signal is generated through the man-machine interaction interface circuit and transmitted to the microcontroller. The duration of the acquired continuous first level signal is matched with the progress bars with the corresponding length and password values through the microcontroller, and password input is displayed in the display screen. Compared with the prior art, the single key and the display screen are combined for password data input, the situation that a lawbreaker steals a user password by installing a password stealing keyboard can be effectively avoided, and therefore password information safety of a user can be effectively protected.

Description

technical field [0001] The invention relates to an information input method and its equipment, in particular to a password input method and its equipment; it belongs to the field of electronic information engineering. Background technique [0002] Password input and its password keyboard are one of the essential computer peripherals for the financial cash register system. They are widely used in communication, government, transportation, industry and commerce, taxation, supermarkets and other service industries. They are used in conjunction with banking systems, POS machines and management systems. Mainly used to enter passwords. Along with the increase of bank card users and the increasingly prevalent consumption of swiping cards, more and more people pay attention to the PIN pad. Guaranteeing the safety of entering passwords is a basic function that a password keyboard must have. PIN pads can be divided into LCD, voice, encryption, touch and other types. With the develo...

AI Technical Summary

Problems solved by technology

However, a password controller and an additional control circuit are required, which greatly increases the complexity of the password input device and makes it difficult to implement

[0010] To sum up, the above-mentioned various password input methods or devices all have problems such as low security, complex structure and high cost. Therefore, a password input device with simple implementation, convenient operation and high security performance is currently required in the market.

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