The method is for ensuring secure forwarding of a message is performed in a telecommunication network that has at least one terminal from which the message is sent and at least one other terminal to which the message is sent. One or more secure connections are established between different addresses of the first terminal and address of the other terminal. The connections define at least said addresses of the two terminals. When the first terminal moves from one address to another address, a secure connection, which endpoints are the new address of the first terminal and the address of the other terminal, is registered to be at least one of the active connections.