Research On The Approach Of SWIM Data Sharing Based On Multi-dimensional Data Encryption

SWIM(System Wide Information Management) is specified by ICAO(International Civil Aviation Organization) as NGATM(Next Generation Air Traffic Management)information sharing mechanism. SWIM is a large-scale distributed network. It adopts SOA(Service Oriented Architecture), companies ATM(Air Traffic Management) departments,aviation airports and airlines together, and realizes the whole ATM system data sharing. It is significant to realize ATM CDM(Collaborative Decision Making) and protect the safety of aviation transportation. Therefore, SWIM systems' data-sharing security is directly related to the aviation transportation system's normal operation and its safety.According to SWIM system architecture, based on the characteristics of the shared data and Information security technology classification guide for classified protection of information system, SWIM shared data grading is realized and the approach of SWIM data sharing based on multi-dimensional data encryption is proposed in this paper.Multi-dimensional data encryption technology adopts different grade encryption methods according to demand of SWIM data. Multidimensional encryption algorithms are divided into line, word, character and binary four levels, the first three level uses block encryption technology, with the increasing of time and complexity, it is more difficult to be cracked. The fourth adopts stream encryption technology which has high ability to resist cracking.Meanwhile, the informative abstract of SWIM data is produced by MD5, by which the integrity of SWIM data can be well protected. RSA is used to encrypt the key to assure its safety transportation.Under the data security sharing scheme presented in this paper, the experimental environment of SWIM shared data is built, then SWIM Shared data security approach is implemented and tested under VS2010. The experimental results show that the scheme guarantees the SWIM shared data confidentiality, can offer SWIM share data protection grade,and has certain feasibility.