A user commuting to work via public transport received an offensive image on their smart phone from another
commuter. Which of the following attacks MOST likely took place?
The question states that the ‘attack’ took place on public transport and was received on a smartphone.
Therefore, it is most likely that the image was sent using Bluetooth.
Bluejacking is the sending of unsolicited messages over Bluetooth to Bluetooth-enabled devices such as mobile
phones, PDAs or laptop computers, sending a vCard which typically contains a message in the name field (i.e.,
for bluedating or bluechat) to another Bluetooth-enabled device via the OBEX protocol.
Bluetooth has a very limited range, usually around 10 meters (32.8 ft) on mobile phones, but laptops can reach
up to 100 meters (328 ft) with powerful (Class 1) transmitters.
Bluejacking is usually harmless, but because bluejacked people generally don’t know what has happened, they
may think that their phone is malfunctioning. Usually, a bluejacker will only send a text message, but with
modern phones it’s possible to send images or sounds as well. Bluejacking has been used in guerrilla
marketing campaigns to promote advergames.