Design of a Handheld Terminal which Has Encryption and Decryption Function

Abstract

In this paper, a handheld terminal is designed which has encryption and decryption function to solve the problems of relatively lower security level of the traditional terminal equipment’s transmission data in electrical communication. This handheld terminal not only can implement the screct key update and recovery, load switch controlling, charge adding, parameter setting, data reading function and so on , but also through introducing advanced encryption and decryption techniques and using security unit,, , can ensure that the transmission data was not altered in the communication and transmission data’s integrity and confidentiality was not destroyed. This handheld terminal has great practical value.