Illegal wiretapping poses ever bigger risks to the confidentiality of voice communication, as the respective technical effort has even become less complex with the advent of Voice over IP (VoIP) and mobile networks. So-called IMSI-catchers are available on the market which fake a base station towards a mobile phone and can thus be used for a man-in-themiddle attack. Other attackers focus directly on the internal network of a mobile provider to catch many more calls as they pass the respective switches. This danger becomes especially very real when road warriors travel in less secure or trustworthy areas around the world.
Up to now, the market predominantly offered isolated stand-alone products for voice encryption in one single network that required identical, specialized enduser devices. This has constrained the broad and easy use of such technology. Hence the Sirrix.CryptoGateway combines secure mobile communications with existing land line devices based onVoIP or ISDN technology. The CryptoGateway connects encrypted calls between secure mobile phones and any standard phone set acting as an extension of a private branch exchange within an organisation. This ensures that outsiders are always faced with fully encrypted voice calls while at the same time ensuring that any extension within the organisation can be used to communicate with secure mobile phones. This effectively prevents unsecure connections via the mobile or public fixed telephone network.