Bluetooth is a popular short-range wireless radio technology that lets supported devices -- such as a smartphone and a small headset in your ear -- communicate with one another so you don’t need a cord running between them. Bluetooth headsets (and Bluetooth speakerphones, car stereos and GPS devices) are an effective way to chat on the phone while keeping your hands on the wheel and eyes on the road. Many computers also offer Bluetooth connectivity for use with compatible mice, keyboards, headsets and game controllers.

But you’re concerned about how secure your conversations are.

Is there anything to worry about? For the most part, no. Bluetooth is quite secure -- it’s not likely someone could digitally eavesdrop on your conversation or access your data -- but it doesn’t hurt to be extra-cautious.

Bluetooth devices require a passcode to type in when pairing with another Bluetooth device for the first time. By default, the passcode is 0000; that’s why it’s recommended to change the passcode to something else when you get the phone, just to be safe. In addition, Bluetooth 2.1 requires mandatory encryption for most connections, which should also help reduce the threat of a security attack from nosy (or malicious) types.

If you’re concerned about vulnerability, you can disable the “discoverable” mode, meaning anyone in the vicinity won’t know you’ve got a Bluetooth device. You can also turn off the Bluetooth function on your laptop or phone when you’re not using it.