Traceability for PNT security service

With the development and application of GNSS and other navigation technologies, the security and credibility of PNT information and relevant services become increasingly prominent. In this article, characteristics of PNT security service are analyzed and the problem of common security responsibility is proposed, thus to carry out space-time information service traceability researches including concept and methodology. Finally, take the unmanned vehicle as the typical application scenario to case analysis. Related research results provide technique for security responsibility definition and risk aversion, under the common security problem.