Blue-tooth can be described as a wireless technology standard for transmitting data over a very short distance( few meters). Blue-tooth technology use radio waves for transmitting data. It is a very popular method in data transferring between mobile devices specially in mobile phones. There are many reasons for its popularity this technology is a wireless technology, security is higher than older methods and easy to use these were some facts which made bluetooth popular . In earlier stages in mobile devices they used infrared data transmission technology. many mobile phones used this method to data transfer, but later with the arrival of the blue-tooth. Blue-tooth became more popular.
Normally in any blue-tooth enabled mobile devices can be connected with each others very easily( except iphones, iphones can be connected only with iphones). After connected, it can do lots of operations depend on the condition of the mobile device. Such as file transferring, remote controlling, working as a music player. Also it can make person al area networks of 3MB/s speed.
When we consider the security aspects, even security is not too high but it has some average features. Normally if a device does not like to be detected it can go to invisible mode. Also when a connection is going to be established it ask for pass key. These are some security features of blue-tooth. Modern devices has more security features.