Modern telecommunication solutions are highly integrated into the world wide web and thus exposed to many security risks. In the context of dissertation are presented possible solutions for the corporate environments as well as service providers of VoIP telephony, which comply with safety requirements in telecommunication networks. They are made on the basis of the security model which was developed for the co-existence of information technology and telephony.
With the advent of VoIP telephony new protocols appeared in the IT world that enabled telephony services in the private and public networks. Due to the specifics of the new protocols, session oriented services and new security threats, has so far firewall as the only network border security element become insufficient in terms of enabling services as well as in terms of providing security. This resulted in the appearance of a new network element, referred to as a session border controller.
Based on session border controllers a new independent security model has developed, which successfully complements with classic security model of information technology. Model features, methods of simulations, testing and its use in access and peering mode are presented in the dissertation. The model is given in a basic and in an advanced form with supported cryptographic functions. Supporting elements supplement the model, that are crucial in service provider networks.
The last chapter describes design of security solutions for service providers as well as corporate environments. Featured security measures cover all areas involved in the architecture of modern telephony. The theme of determination level of safety is considered on the basis of a risk assessment and cost estimates for implementation of safety. The management of the solution is delivered through the use of the life cycle.
|
