Study On Data Security Technology Of Cooperative Product In NC Manufacturing

With the rapid development of Chinese Manufacturing Industry and the competition heating-up of global economy, the cooperation between manufacturing enterprises should be intensified. But many unsafe factors about data security of cooperative product have been discoveried in cooperation. Data leakage has done great damage to some companies. Facing the fact that cooperative product's data is not safe, some companies can not ensure that data of cooperative product is secure, when they adopt cooperative way by signing contracts about data security and by dispatching a special person to trail the process of manufacturing; while some others have to spend a lot of money in buying CNC machine tools or would rather wait for their CNC machine tools to produce for a long time than manufacture through cooperative way, which severely hinders the process of product development and production.The failure of data security of cooperative product impacts on the utilization efficiency of CNC machine tools in realm directly, beats down manufacturing enterprise's enthusiasm for cooperation, increases product's cost and retricts production efficiency. Therefore, it is very important to study on data secure technology of cooperative product, which can promote CNC machine's utilization efficiency, boost companies'cooperation and heigten the production efficiency.On the basis of the technology of embedded system and data encryption, it mainly studys on cooperative product's data security in NC manufacturing. It integrates the characteristics of embedded system into the data security technology of cooperative product. Safe measures and data encryption technology are applied to ensure that the cooperative product's data is secure in the terminal, the server, the CNC machine tool and transmission lines between them.It discusses about the safe serial communication about long NC programs between the embedded terminal and the CNC machine tool, which is realized by adopting the way of DNC communication. After analyzing characteristics about some kinds of data encryption algorithm, the Rijndael encryption is selected to realize cooperative product data's storage in the server and transmission in Internet on encryption manner. Cipher can only be decoded in the terminal. Because computation of the Rijndael only needs a little of memory, so it is proper for cooperative product's data to encrypt in the terminal whose hardware is limited. All programs are written in C/C++ language in Linux and...