Design Of Various Confidential Mode Phone System

With the approach of 3G period, the mobile communication is already becoming an indispensable part of our lives. Thanks to the openness of wireless channel, the wireless communication security is becoming a focus to the public.This paper designs a telephone system with a various confidential mode on base of public mobile network. This system is formed by communication terminal and control center. This telephone system contains normal wired call, secret wired call, normal wirelss call and secret wireless call, which will change into different phone functions according to the different advices.This paper does search on secret calculation by using RSA and AES in order to realise ID confirmation and online promotion. It also uses CPRS to make voice and data communication secret.The secret system uses high speed DSP as the hardware paltform and this paper tells about the system's blue print's design and construction, as well as the introduction of system hardware platform style and outer-joggle design. It shows the design of this system software whose details are as follows:the design and structure of the DSP system, introduces the design of hardware and related interface and the software of ARM including the design of main flow, interrupt flow and exterior communication.Various confidential mode phone system can be used widely in any places who need to be keep secret, which can assure data's safety and be popular in the future.