The Extroverted Bluetooth Cell Phone
A Bluetooth cell phone is one of technology's little marvels. Cell phones themselves are remarkable enough, freeing all of us from the need to stay near land-line telephones in order to communicate. A Bluetooth cell phone is so amazing because it not only "talks" to other cell phones when you dial their numbers; it will talk to any sort of Bluetooth enabled device from your car's Bluetooth GPS navigational system to your Bluetooth equipped personal computer to your (yes, really) Bluetooth enabled land-line telephone.
When you are home and your Bluetooth enabled landline phone picks up the signal from your Bluetooth cell phone, it will actually reroute any calls coming into your cell phone to itself. And the conversations which your Bluetooth cell phone holds with any other of your Bluetooth devices use a whopping one milliwatt of your battery's power. That amounts to a lot of talking for not much energy at all.
Bluetooth is actually a radio frequency standard; Bluetooth cell phones are designed so that their radio signals do not interfere with any other devices which operate near the same radio signal frequency of 2.45 gigaHertz, like your garage door opener or the most recent models of cordless phones. That's why the Bluetooth cell phone signal is deliberately kept weak, at a single megawatt.
What this means is that your Bluetooth cell phone can only use its Bluetooth functions to converse with other Bluetooth enabled devices from distances of less than about thirty-two feet, or ten meters. This makes it easy for you to avoid interfering with any nearby radio-frequency devices. But because can signal through walls and without being in a direct line of sight to the other Bluetooth devices with which they are communicating, you can use your Bluetooth cell phone to manage a network of devices even if they are not in the same room.
You really don't have a say in whether that network develops; as soon as your Bluetooth cell phone is within the thirty-two foot range of any other Bluetooth device, the conversation begins, and can encompass up to eight Bluetooth devices simultaneously.
As remarkable and helpful as Bluetooth technology is, a Bluetooth cell phone does have its vulnerabilities. Where there are vulnerabilities, there are those ready to exploit them, and Bluetooth cell phones have been targets for virus writers. The first of these viruses, Cabir A, was a "test" virus created out of curiosity, and ensuing research could discover what pre-emptive antivirus measures Bluetooth cell phones required.
Because Bluetooth cell phones will automatically connect to any nearby Bluetooth device, they could be susceptible to receiving virus-loaded file from those devices. So now Bluetooth cell phone connections require that any data being set by unfamiliar devices be authenticated before it is accepted, and even if it somehow got through, would have to be opened and installed by the Bluetooth cell phone's user.
This triple-layered security system has kept Bluetooth cell phones extremely secure for the present, and further measures are under development.