Research On Secure Distribution And Transmission Of Images In Space Information Network

Space Information Network(SIN)will be an important information infrastructure in China's network system in the future.Compared with terrestrial networks,it has advantages of wide coverage and low comprehensive cost.It is foreseeable that the Space Information Network characterized by integration of communication,navigation and remote sensing will form a wide coverage,and distribution of remote sensing images is one of its important applications.In order to achieve the efficient distribution of space information such as remote sensing images,many researchers attach great importance to on-board storage.Especially,the architectures represented by ICN are integrated into Space Information Network,and significantly reduce user latency in accessing content with in-network caching.However,this way of deploying caches on intermediate nodes brings great challenges to security while improving the efficiency of content distribution.In particular,the unstable topology of Space Information Network and the highly exposed links are more vulnerable.Therefore,it is necessary to design an effective and secure image distribution scheme.In this thesis,taking full advantage of the characteristics of on-board cache,a safe distribution scheme for image content was designed,which could realize the traceability of image distribution.And in this scheme,a certificateless key agreement scheme without secure channels was adopted to realize the secure transmission of data.The main contents are summarized as follows:1.Aiming at the problem of illegal distribution introduced by in-network caching,a safe and traceable image distribution scheme was designed.This solution used a key data protection method based on JPEG2000,which combined centralized distribution with in-network caching,allowing only authorized users to obtain complete image data,and unauthorized users could not extract valid content from the node cache only.The analysis and experimental results show that the proposed scheme effectively solves the problem of redistribution by malicious users while only sacrificing a small amount of distribution efficiency,and achieves a balance between security and efficiency.2.In order to ensure the safe transmission of key data in images,a certificateless key agreement scheme without secure channels was incorporated into the secure distribution scheme.This scheme transmited a pseudo-partial private key during the user registration phase,which avoided the use of high-cost secure channels.The security of the scheme was proved under the e CK model,which satisfied basic impersonation attack resilience,key compromise impersonation attack resilience,ephemeral secret key leakage resilience,known key security,forward security,unknown key share attack resilience,no key control and other security properties.The results of efficiency analysis show that the proposed scheme has a lower amount of calculation than the existing schemes and is more suitable for Space Information Network.