The Node Security Access Authentication Method for Mega-Constellation based on Sharding Blockchain

The mega-constellation is a major future development direction for space-based technologies in communications, navigation,remote sensing, and other fields. However, there are marked security threats to the mega-constellation. Traditional password-based security protection techniques are inefficient for vast node access authentication because they lack a unified management system and methodology. To address the aforementioned issues, this work presents a mega-constellation node security access authentication technique based on sharding blockchain via the "1 + N + 1" mega-constellation security and trustworthiness architecture. We build a distributed node security access authentication system based on functional domains and functional cross-domains, and we develop mathematical models for the complexity of messaging and space, the throughput of transactions, and the overall estimation of sharding blockchain systems. The results demonstrate that every indicator outperforms conventional blockchain techniques, which has major implications for mega-constellation by creating a complete link security and trustworthiness system. A universal solution for the number of consensus nodes I and the number of shards N is found, which can be used to guide parameter design in mega-constellation sharding blockchain systems.