Pryvate™ Anti-Blocking

Pryvate Anti-Blocking

Pryvate™ has developed a VoIP anti-blocking solution for users who wish to bypass illegitimate firewall restrictions on 3G networks.

Many countries block voice-over-internet protocol (VoIP) calls as they are seen as a drain on the revenue of their telecommunications companies, and a way of evading the control of governments and their security services. As a result, Pryvate™ has developed a VoIP anti-blocking solution for users who wish to bypass illegitimate firewall restrictions on 3G networks.

For the technically minded, here’s how our solution works.

When making a call, a ‘session initiation protocol’, or SIP, is used to allow two endpoints to shake hands; then a ‘real-time transport protocol’ (RTP) carries the traffic. Our system works in real time by ‘tunnelling’ the SIP and RTP traffic into a single encrypted HTTPS connection using flexible virtual tunnelling architectures for achieving seamless voice and video calling.

The solution consists of a ‘tunnel client library’ that is integrated into the user’s Apple or Android device and a tunnel server that is deployed inside Pryvate’s network infrastructure. The tunnel server uses the data of each secure connection to recreate the SIP and RTP traffic from the client’s smartphone.

Its principle is tunneling all SIP and RTP traffic through a single secure https connection up to a detunnelizer server. Our solution comprises:

  • A tunnel client library to be integrated into the Pryvate client for iPhone or Android.
  • A tunnel server is deployed inside our network infrastructure. The tunnel server re-creates the SIP and RTP traffic from the data of each secure connection to the clients.

Our client and server software is optimized to minimize latency inherent to TCP encapsulation of VoIP traffic: it is not just a general purpose VPN.

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