Ultra-reliable secure data aggregation scheme with low latency for isolated terminals in 5G and beyond defined STINs

5G and beyond defined space-terrestrial integrated networks (STINs) have become an emerging research field, thanks to the rapid development of future generation communication technologies and satellite networks. Ultrareliable low latency STINs utilizing 5G and beyond technologies put forward requirements for the trustworthiness of network terminals and the convenience of data aggregation. Some research work has been carried out in this field. However, the secure aggregation in STINs between isolated terminals that lack connection with base stations and data centers needs to be further studied. In this paper, a trustworthiness based secure data aggregation scheme with low latency for isolated terminals in 5G and beyond defined STINs is proposed. The trustworthiness of the isolated terminals is evaluated by the satellites and the data centers to increase the reliability of the aggregated data. A lightweight trusted special channel establishment method between an isolated terminal and a data center is presented. The security and performance analysis shows that the novel proposal is secure and efficient.