In regular telephony services the security and consumer protection standards have been defined and are generally found adequate. With regard to the IP services, there is no one-to-one relation between the service and the physical infrastructure. In the IP networks, anyone with access to the network can tap the signal and actively damage the integrity of the message and the signal. For example, to ensure privacy in VoIP application, the VoIP provider can implement end-to-end encryption, which is not 100% secure, but can establish security levels comparable to those of regular telephony. The end-to-end encryption will, on the other hand, prevent the authorities from lawfully tapping the VoIP signal, i.e. from using ‘Lawful Interception’.