The present invention relates to a novel trust migration method for cross - domain mobile entities in
the Internet of Things in a cross - domain trust migration platform. The basic idea is as follows: The trust migration request of the target user for a certain
mobile entity is sent to the trust migration calculation center of the cross - domain trust migration platform by the user - side module. The trust migration calculation center extracts the domain trust attributes of the domain where the target user is located and the domain where the
mobile entity was located before migration respectively, and calculates the correlation degree of the domain trust attributes of the two domains. Then, based on the trust evaluation criteria within the domain before migration, the trust of the
mobile entity before migration is calculated. Finally, the trust of the mobile entity after migration is deduced according to the correlation degree of the domain trust attributes of the two domains and the trust of the mobile entity before migration. This method can migrate and share the trust of cross - domain mobile entities in
the Internet of Things, and solves the trust migration problem when mobile entities roam among multiple domains. It belongs to the field of computer networks.