Infrared Communications - Utility and Security

I was first introduced to infrared communications when purchasing my first cell phone (3 1/2 years ago). I favored the Bluetooth, but it is not a technology that should be overlooked. My understanding is that Bluetooth was invented as an enhancement to Infrared (in terms of energy efficiency and increased range). Infrared finds utility in direct connections.

Reportedly, Infrared technology allows computing devices to communicate via short-range wireless signals (approximately 5 meter range limit). The infrared transmission technology used in computers is similar to that used in consumer product remote control units. In comparison with about 100Mbps maximum communication speed in wireless communications, there is a possibility of 1Gbps with infrared communications (due to its much shorter wavelength than wireless communications, broadband communications are available). In this way, infrared communications are suitable for transmitting large amounts of data such as animations. The most common use for infrared ports is to transfer files between devices. For example, you can transfer files between a Windows CE device and a desktop PC or between two notebook PCs.

The two main problems with Infrared are the sun and line-of-sight (similar to a TV remote, devices must be point directly at eachother to communicate). The sun gives off a lot of infrared light. In direct sunlight, the IR receiver can be "flooded" and won't be able to see any incoming messages (best used indoors).

Now onto security issues - Because infrared operates at such a short distance (and a narrow angle), it is relatively difficult for an attacker to intercept data that is being transmitted. Infrared communication is secure with high concealment in its ability to specify its receivers, based on the strong directivity of infrared communication. However, infrared does not provide data encryption. Because data is sent in plaintext, it is vulnerable to packet sniffing attacks.

There is a plethora of communication options available; Infrared's lack of data encryption is certainly a major downfall, but I believe that there are viable uses for this technology (a quick exchange of contact information/virtual business cards, for example). I am uncertain as to its popularity in the professional world, but would bet it has its place.


Sources:
http://compnetworking.about.com/od/homenetworking/g/bldef_infrared.htm
http://www.contrib.andrew.cmu.edu/~rgockley/legos/ir.html
http://technet.microsoft.com/en-us/library/cc775941.aspx
http://linkevolution.e-globaledge.com/english/infrared/aboutir.html