Reusable encryption keyboard circuit and design method thereof

Abstract

The invention provides an anti-bootlegging and anti-attacking reusable encryption keyboard circuit and an encryption method thereof. The reusable encryption keyboard circuit includes a programmable keyboard scanning and encrypting chip and an encryption control circuit. The programmable keyboard scanning and encrypting chip is used for scanning keyboard information, encrypting under control of the encryption control circuit, and inputting the keyboard information to a computer. The reusable encryption method includes: firstly, the keyboard information is scanned to be written in a caching area by a keyboard scanning circuit; secondly, encryption state, encryption manner and replacement of a secret key by the encryption control circuit are controlled so as to realize encryption of the scanned keyboard information; and thirdly, keyboard data enters an encryption mode, and encryption algorithm and the secret key are replaced according to a control instruction, and accordingly safety class of data recorded by the keyboard can be kept high. Data can be encrypted in multiple modes without a redundant hardware circuit by the reusable encryption keyboard circuit and the encryption method thereof compared with the prior art, and accordingly real-time construction of the keyboard information is facilitated, and safe transmission of the keyboard information is achieved.

Description

technical field [0001] The invention is applied to terminal input devices in the fields of finance and communication, and specifically relates to a reusable encrypted keyboard circuit and a design method thereof. Background technique [0002] Currently, banking systems and mobile terminal input devices all input information through keyboards. However, due to the inherent limitations of personal computer hardware and software, computer hackers have the opportunity to use Trojan horse programs to implant keylogging software or hardware skimming devices in computers, and the keystroke data entered by users through the keyboard is easily stolen by hackers. Pick. If valuable information such as credit card numbers, online bank account numbers, or online game account passwords are stolen, it is likely to cause property losses to users. On the other hand, the skimming software or hardware will record any information entered through the keyboard for a long time, thereby causing in...

AI Technical Summary

Problems solved by technology

[0005] The present invention is aimed at the need to encrypt information entered through the keyboard, and the existing antivirus software does not have protection for the bit stream data below the driver layer. The existing encryption device has high cost, is not portable, is not conducive to upgrading and maintenance, and cannot For the problem of reuse, a reusable encrypted keyboard circuit and its design method are proposed

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