Patent ID: 7690027

Claim:
A method for reliable and secure enabling of a Public Key Infrastructure (“PKI”) part of a Smart Card of a first mobile terminal, said mobile terminal connected to a mobile communication network providing access to a PKI server, the method comprising: a) generating matching first and second activation codes associated with a deactivated PKI part of a Smart Card, the first activation code being stored at a PKI server; b) receiving electronically a first request for activating to a PKI key-handling state the deactivated PKI part of the Smart Card for a user at the PKI server, c) processing said request at said PKI server, d) generating a text message at the PKI server, where the textual content of the text message is a response to the processing of the first request, and sending the text message to the first mobile terminal, e) responding to the received text message at the first mobile terminal by sending a second activation code and a SIM card identity associated with the first mobile terminal as a text message to the PKI server, f) comparing said sent second activation code with the previously store first activation code at the PKI server, and, if the two activation codes match, transmitting from the PKI server a message to the first mobile terminal indicating the match, wherein said message is a command activating the PKI part of the Smart Card to the PKI key-handling state, g) generating a private key and a verification public key (“VpuK”) as a key pair, using the activated PKI part of the Smart card.