The present invention relates to a method for operating a secure device, a mobile device, and secure device. The method for operating an secure device establishes an IP session between a secure device and a target device whose IP address is dynamically allocated, the secure device being adapted to be inserted into a wireless device, the method comprising: the secure device sends a request to a DNS client residing on the wireless device to resolve a FQDN to the IP address of the target server; the secure device receives, from the DNS client residing on the wireless device, the IP address of the target server; and the secure device initiates an independent commitment protocol session with the target server by using the received IP address.