PUBLIC-KEY INFRASTRUCTURE BASED CERTIFICATION METHOD IN MOBILE COMMUNICATION SYSTEM

摘要

PURPOSE: A public-key infrastructure authentication method in a mobile communication system are provided, which are capable of safely mapping with a public authentication document without exposing a mobile telephone number by storing a result value, which is obtained by calculating the mobile telephone number and additional data using a non-reciprocal function. CONSTITUTION: A user requests issuing of an electronic certificate through connection with a registration server(S102). The registration server extracts a mobile telephone number of a mobile terminal of the user to transfer the extracted mobile telephone number to an authentication server, and issues a token and to transfer data the mobile terminal(S104-S106). The authentication server confirms a validity of a certificate application message, calculates the mobile telephone number and additional data using a non-reciprocal function, stores a calculated result value in a predetermined field, and issues an electronic certificate(S108-S112). The authentication server transfers the issued electronic certificate to the mobile terminal and simultaneously keeps the issued electronic certificate in a certificate directory server(S114-S116). The mobile terminal stores downloaded electronic certificate and key. If a user requests a security service, the service server calculates a telephone number of a mobile terminal and additional data using a non-reciprocal function, and requests necessary electronic certificate to the directory server using the calculated result value(S118-S120). The directory server transfers a requested electronic certificate to the mobile terminal(S122).