The invention discloses a distributed access
authentication management method in an LEO
satellite network. By adoption of an identity-based
cryptosystem, the public and private key pair of a user and a
satellite node is rapidly generated by utilization of the private key of a
key generation centre; furthermore, identity information is appointed in an identification field, so that role differentiation in a
system is realized; simultaneously, on the basis of a chain distributed storage technology of a
blockchain, a trusted chain taking the
key generation centre and a
satellite as trust main bodies is constructed; the identity
authentication function for
rapid access authentication and inter-satellite rapid switching of users can be realized; the method is suitable for dynamic topology and frequent switching of a satellite-to-earth link in the LEO
satellite network; on the other hand, the distributed storage technology of the
blockchain is adopted in the method; the trusted chain is used as a
consensus mechanism; related information, such as user registration, cancel, login, logout and switching, can be recorded; the accuracy, the integrity, the consistency, the retrospective property and the non-tampering property of user logs can be ensured; and thus,
bottleneck restriction of centre nodes on the access function and the authentication property can be avoided.