Study Of The Data Secrecy Integrated Avionics Loading And Recording System

With the rapid development of information technologies and computer's capability, people are now paying more and more attention on the information security. Because military information is every important, guaranteeing the security of this kind of information is in great demand.In existing Integrated Avionics Dataloading and Recording System, mobile memory device is used to transfer mission data and recorded data between onboard device and on-ground device. In the process of transfer, data is in plaintext or similar format. When recording, data is also recorded using plaintext or similar format. In this case, an attacker is easy to get the import information. The emergent way to destroy data is to short the hardware of mobile memory device. So when destroy data, also destroy the memory device.This thesis shows detail information for the encryption and decryption technology analyzes and researches data secrecy of Integrated Avionics Data Loading and Recording System. Using mature encryption and decryption technology, designs and realizes real-time data secrecy for Integrated Avionics Data Loading and Recording System.The thesis researches some fields as follows:1. Analyze the background. Show the meaning of this study. Discuss current technical status and technique trends. Clarify system's request for security.2. Introduce the encryption and decryption technology. Choose the suitable encryption and decryption algorithm used in this thesis. Introduce the chosen algorithm in detail.3. Develop top level system encryption and decryption design, and detail component encryption and decryption scheme. Introduce encryption and decryption engineering technology related to Integrated Avionics Data Loading and Recording System and implement the software and hardware.4. Use C language to program the key manager, encryption, decryption and interface. Then using hardware to replace onboard software encryption and decryption software in order to improve the efficiency. 5. Test function and performance of the system. Analyze and test the system process speed for different algorithm and block division.Using encryption technical, after encryption and signature, original dada is loaded to memory device in cipertext format. Onboard device and on-ground device download data. After decryption and verification, ciphertext becomes plaintext and then can be used. This way can guarantee the secrecy and accuracy. Using multiple encryption and decryption methods, and using hardware and software flexibly, the speed is improved to guarantee real-time. Using this method, if emergent, just changing one bit of the key can destroy the data without destroying the mobile memory device.After improvement and perfection, the research result can be used in army, police field which need real time and security.