Abstract: System wide information management (SWIM) is a fundamental network system, which supports aviation collaborative decision making (CDM) by using big data analysis. Likewise data security and privacy protection issues exist while providing aeronautical information exchange and data sharing. According to the service-oriented architecture (SOA) of SWIM, an authorization approach based on attribute-based encryption (ABE) was proposed to solve the problem of SWIM information security. Cipher policy- attribute based encryption (CP-ABE) was applied to meet the characteristics of distributives, heterogeneousness and dynamic in SWIM access structure. Experiments on the security of SWIM authorization approach based on the CP-ABE algorithm were performed in simulation environment. Results indicate that the proposed approach supports fine-grained authorization for the aviation users of SWIM with more security and lower complexity.