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 metres on
mobile phones, but laptops can reach up to 100 metres with powerful
transmitters.
The name originated with a user named ajack on esato.com. Ajack was
in a bank, searching for other BT enabled devices. When he found a
Nokia 7650, he sent the owner a message saying "Buy Ericsson". He
called it bluejacking, and it stuck ever since. Ajack together with
Droll subsequently developed a utility for Symbian UIQ called SMan
which was the first bluejacking software for a smartphone.
Applications designed for Bluejacking such as MobiLuck ,Easy Jack
or recently Nokia Sensor are launching the MoSoSo (Mobile Social
Software) Market.
Some people think that the term bluejacking comes from Bluetooth
and hijacking. While that certainly sounds logical, a bluejacker
doesn't hijack anything: he or she merely uses a feature on the
sender and the recipient's device. Both parties remain in absolute
control over their devices, and a bluejacker will not be able to
take over your phone or steal your personal information. It should
be noted that "jack" on many college campuses means "to pull a
prank"- to jack a dorm would be to pull a trick or prank them -
this too may be an origin of bluejacking.
Bluejacking is usually technically harmless, but because bluejacked
people don't know what is happening, they think 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.
With the increase in the availability of bluetooth enabled devices,
these devices have become vulnerable to virus attacks and even
complete take over of devices through a trojan horse program.
for more info, pls refer to wiki
or
www.bluejackQ.com