LONG-DISTANCE COMMUNICATION EQUIPMENT PROVIDED WITH MEANS FOR ADVANCE PAYMENT WHICH ALLOWS SAFETY REMOTE LOADING AND REMOTE LOADING METHOD

摘要

PURPOSE: To secure both secrecy and maintenance for a remote loading method of value unit for prepayment. CONSTITUTION: This facility includes an active authentication mode of an independent set (PA) and an access system (SAA), a calculation mode of a remote loading master key (KCH or (SCH, PCH)) set at the level of a certification center (CA), a transmission mode set to the access system (SAA) of an enciphered remote loading master key, and a remote loading mode that offers a safe remote loading method of a prepayment means (MPAY) to be executed by the access system with the help of the remote loading master key that is transmitted in the said way respectively in response to a prescribed number of remote loading request words (R) of value units which are given from the set (PA).