Voice communication, since it was technically possible because of the telephone invention, has become increasingly important in people's life, anywhere in the world
Over the years, the telephone networks have multiplied and, today, together with the World Wide Web are the most used ways to establish a global communication.
Availability together with the ease made the telephone network a success in the inter-personal communications, whether they are domestic or professional.
On the last decade, the world has witnessed the expansion of mobile telephony. Particularly, the mobile phone network, bringing even more mobility and availability to the system.
Today, there is a large global network, with big availability, mobility, low cost and large utilization rate, but with one big problem: LACK OF PRIVACY. The lack of confidentiality restricts the use of the network for the use of low or no significant value communication. The valuable issues, treated by companies or organizations, are exposed to listening.
Given the heterogeneity of technologies, equipments, interests, etc. It is almost impossible to implement communication privacy using the own network resources.
As a solution to this problem, Z Tecnologia has developed an architecture for privacy implementation on telephone networks. It is based on the addition of a digital cryptographic module, located in every two point of the network, which are intended to protect.
