Digital certificate lightweight transmission method and system thereof

The invention provides a digital certificate lightweight transmission method. The method comprises the following steps: presetting trust certificates stored in a broadcast terminal device to generatea trust certificate list, and sending the trust certificate list to an authentication center device in the form of an application request message; receiving authorization message data information returned by the authentication center equipment according to the application request message, broadcasting on the broadcast terminal equipment; and the broadcast terminal device identifies the certificatenumber of the authorized broadcast terminal device, and when the certificate number of the authorized broadcast terminal device corresponds to the broadcast terminal device, the broadcast terminal device verifies the digitally signed trust certificate list and the digitally signed trust certificate data according to a preset root certificate and stores the verified trust certificate list and thedigitally signed trust cert