Low-orbit satellite security authentication method based on spatial channel characteristics

Abstract

The invention relates to the technical field of spatial information, and discloses a low-orbit satellite security authentication method based on spatial channel characteristics. The method comprises a three-layer SDN distributed control structure consisting of a ground control center, a GEO satellite controller and an MEO satellite controller. In the whole authentication process, key agreement contains timestamp information, so that the freshness of the message is ensured. After the timestamp T is acquired, whether the timestamp T is within an allowable time range delta T is detected, if the timestamp T is valid, the acquired secret key is fresh, replay attacks can be effectively resisted, symmetric secret keys generated in the subsequent authentication process are iteratively generated based on the initial KEYab, and the shared secret key needs to be updated again every time a session is ended. The new secret key is based on the Hash operation of the channel characteristic value and the message and has randomness, so that even if an attacker obtains the current shared secret key, a subsequent new secret key cannot be generated, and the independence of the authentication process is guaranteed.

Description

technical field [0001] The invention relates to the technical field of space information, in particular to a low-orbit satellite security authentication method based on space channel characteristics. Background technique [0002] With the rapid development of space information technology and the proposal of space-space-ground integrated information network, the importance of space network in the field of information technology has gradually increased. Due to the openness of the air-space network channel and the large number of satellite nodes, its security issues cannot be ignored, especially in military and commercial security applications that deserve more attention. In recent years, with the continuous maturity of software-defined network (Software Defined Network, SDN) technology, the introduction of SDN topology into the aerospace network has become an effective solution to reduce the cost of satellite construction. At the same time, the SDN architecture can also solve...

AI Technical Summary

Problems solved by technology

However, the main characteristics of the satellite communication system are high delay and less channel link feedback information. It is still difficult to accurately quantify the channel information into a shared key scheme in satellite communication, but the channel eigenvalues ​​can still be obtained in the space network. As an authentication parameter, solve the problem that traditional authentication schemes cannot resist brute force cracking within the threshold range

Images