Access-protected memory zones in network elements are localized in an operator's network that supporting the reconfiguration of SDR terminals in combination with protected data transmission methods which include methods for authenticating and authorizing the communication partners and for communicating in a protected manner, especially to protect integrity and confidentiality. Such access-protected data is provided by the terminal and is transmitted to the radio access network in the framework of negotiations and is temporarily stored therein or is generated directly in the RAN in the framework of processes related to the terminal. The generation and management of access-protected memory zones by the network operator result in a massive relief of the load to which the air interface is subject while also significantly alleviating the network infrastructure with regard to signaling.