Swiss company Vectrotel makes and markets the Vectrotel X8, a GSM cell phone that encrypts your conversations with an unbreakable cypher. Here's how it works. First off, you need two phones. When you place a secure call (you can also place regular calls), they perform a 1024-bit Diffie-Hellman shared secret exchange, to generate a secret 128-bit key. This process takes between 10 to 30 seconds. Only the two phones share this unique key: it is generated before each call, and deleted after each call. Once the key is generated, conversation is subsequently encrypted and your call is secure. What's even more interesting is that they have made the phone inconspicuous. The triband unit looks (and also works) like a regular cell phone, and even boasts some decent specs: IR, Bluetooth and USB connections, 1.3MP camera, 240 X 320 QVGA screen, 5 hours regular and 4 hours encrypted talktime.