| 摘要 |
PURPOSE: A spam message blocking of blocking a spam message is provided to authenticate a service providing server by using a generated PIN(Phone Identification Number) digest. CONSTITUTION: An authentication institution server transmits a PIN to a mobile telephone number of a user. The authentication institution server receives a PIN digest issue request from the service providing server. The authentication institution server receives information related to the PIN from the service providing server. The authentication institution server generates the PIN digest(360). The authentication institution server transmits the PIN digest to a plurality of relay servers(370). |
