The Design And Implementation Of One Wireless Encryption Keyboard Based On FPGA

The development of wireless communication technology, is undoubtedly a greatbreakthrough in the field of computer communication. Keyboard as one of the mostcommonly used external equipment of the computer, researching and designing the wirelesskeyboard, not only makes the computer out of bother wiring, but also makes the appearanceof it more delicate, most importantly it can save the limited resources interface of thecomputer. However, compared to the wire communication technology, the obviousdisadvantages of the wireless technology is that the security of the transmission data can notbeen guaranteed.This paper proposes one thought and method of how to design a wireless encryptionkeyboard. For the sender module, using one FPGA as the main controller to control receivingand encryption data which comes from the keyboard, then send the cipher to the wirelesstransceiver module by bluethooth sender module; for the receiving module, bluetoothreceiver module receive the cipher and send the cipher data to the computer CPU, designersthrough writing applications program for PC, complete the decryption operation of the cipher.DES algorithm is a mature encryption algorithm, so far, it can only been decryption bythe exhaustive method. However, for the wireless transmission of the keyboard information,using the exhaustion method to crack the password is not realistic. In addition, the DESalgorithm is a kind of symmetric encryption algorithm, so it can been realized convenientlyby the hardware. Therefore, in this paper, using DES as the core encryption algorithm, usingFPGA as the hardware implementation platform for the DES algorithm, using VHDLlanguage as the main design language and QuartusⅡ software as the simulation andvalidation. in the end, each module is proved to be correct.The propose of the wireless encryption Keyboard, not only is an in-depth study of theexisting wireless keyboard, it can also enrich the blank field of the wireless keyboard, reducethe cost of the design and enhance the safety of the data communication in the wirelesskeyboard field is a beneficial attempt.