Processing voice data in packet communication network with encryption

A method comprising:

• confirming a destination address of a call connection packet with a terminal at a transmitting side;
• storing call connection information within the call connection packet and registering the call connection information with an address translation table upon the destination address being directed to a private network;
• encrypting the call connection packet and transmitting the encrypted call connection packet from the terminal at the transmitting side to a terminal at a receiving side;
• storing the call connection information within the call connection packet therein with the terminal at the receiving side receiving the call connection packet;
• encrypting a call connection response packet responsive to the call connection packet and transmitting the encrypted response packet from the terminal at the receiving side to the terminal at the transmitting side to establish a communication path between the terminal at the transmitting side and the terminal at the receiving side;
• and
• transmitting non-encrypted voice media data using the call connection information via the communication path between the terminal at the transmitting side and the terminal at the receiving side.

An apparatus comprising:

• an address translation table adapted to store address translation information to enable several hosts in a local network to simultaneously communicate with a global network;
• a routing table adapted to store routing information therein;
• an input unit adapted to receive voice media data over an Internet Protocol (IP) network and to determine whether or not the voice media data is virtual private network based;
• a parsing unit adapted to parse the voice media data to detect real-time transport protocol information of the voice media data upon a determination by the input unit that the voice media data is virtual private network based and to register the detected real-time transport protocol information with the address translation table;
• a packet processing unit adapted to translate the voice media data into a virtual private network packet;
• and
• a routing unit adapted to rout the voice media data input via the input unit in accordance with the information stored in the address translation table and the routing table.