Generation method of root key at transmitting end of condition receiving system

The invention relates to a generation method of a root key at the transmitting end of a condition receiving system. The method includes that a safe data management platform distributes Vendor_SysIDs for condition receiving vendors, each condition receiving vendor corresponds to one or a plurality of specific Vendor_SysIDs, chip vendors provides an SCK preliminary processing mechanism for the safe data management platform, and the safe data management platform generates first middle key SCKv according to the SCK preliminary processing mechanism, the Vendor_SysIDs and chip safe key SCK provided by the safe data management platform. The chip vendors provides a vendor separation mechanism, and the chip vendors generate second middle key Seedv according to the vendor separation mechanism, the Vendor_SysIDs provided by the safe data management platform and chip mask key SMK provided by the chip vendors. The safe data management platform transmits the SCKv to the condition receiving vendors, the chip vendors send the Seedv to the condition receiving vendors and provide a root key deriving mechanism for the condition receiving vendors, and the condition receiving vendors generate the root key according to the root key deriving mechanism, the SCKv and the Seedv.