Blue Jacking
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 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. Jack 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.
Some people think that the term bluejacking
comes from Bluetooth and hijacking. While that
certainly sounds logical, a bluejacker doesn't
hijack anything: he merely uses a feature on his
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.
Bluejacking is quite 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.
But with the increase in the availability of
bluetooth enabled devices, these devices have
become vulnarable to virus attacks and even
complete take over of devices through a trojan
horse program.
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