Processing sensitive information over VoIP

A call processor for processing a Voice over Internet Protocol (VoIP) media call comprising sensitive information, the call processor embodied in computer hardware, the call processor configured to at least:

• receive a first signalling stream from a first entity;
• create a second signalling stream to a second entity;
• forward signals received from the first signalling stream to the second signalling stream;
• receive a third signalling stream from the second entity;
• create a fourth signalling stream to the first entity;
• and
• forward signals received on the third signalling stream to the fourth signalling stream;
• the first signalling stream containing instructions to set up a VoIP media call between the first entity and the second entity such that:
• (a) media comprising audio information is transmitted over a first media stream from the first entity to the second entity without intervention by the call processor;
• and;
• (b) media comprising audio information is transmitted over a second media stream from the second entity to the first entity without intervention by the call processor;
• in which, when said sensitive information is to be included in said audio information, the call processor is configured to receive a message from the second entity to reroute said media streams so that these are redirected via the call processor, the call processor configured to:
• (i) send a message to the first entity to cause media comprising audio information to be transmitted over a third media stream to the call processor, create a fourth media stream to the second entity and forward media comprising audio information received from the first entity via the third media stream to the second entity over the fourth media stream;
• and
• (ii) send a message to the second entity to cause media comprising audio information to be transmitted over a fifth media stream to the call processor, create a sixth media stream to the first entity and forward the media comprising audio information received from the second entity via the fifth media stream to the first entity over the sixth media stream;
• in which the call processor is configured to modify media comprising audio information received from the first entity, the call processor configured to remove sensitive audio information from said received audio information before said media comprising audio information is forwarded over the fourth media stream to the second entity;
• and
• in which the call processor is configured to modify media comprising audio information received from the second entity, the call processor configured to remove sensitive audio information from said received audio information before said media comprising audio information is forwarded over the sixth media stream to the first entity.