Method for securing financial calls made through mobile telephones, comprises use of mother and diversified keys located at mobile telephone and server and accessed by personal identification number

摘要

A WAP server (3) receives a user request and asks a library (4) for a certificate request which is sent to the user mobile (2). An applet in the user SIM card asks for the user identification and if correct unlocks access to a cryptographic key, calculates a dynamic certificate which depends on the message and key and sends it to the server which makes the service available if the certificate is valid