To secure the safety of terminal to terminal in WAP mobile commerce information exchange and to supplement the defect of two stage-type safety mechanism in the structure of present WAP (Ver1.1).

The upper face layers of the application layer (WAE) of a radio application agreement are set to be a development platform and a performance environment. Thus, they are independently applied to present entity communication networks (GSM, PDC, CDPD, CDMA, TDMA, PHS, DECT, DPRS and the portable telephone (3G) standard of third generation, for example). An information password and a safety system are additionally installed in a present mobile information server (WML SERVER) of a radio content service supplier (WCP). A portable telephone end software secret/secret release module, a portable telephone end software secret/secret release server program, action information server end secret/secret release server program and a key management-order system are arranged.