Definitions for "Bluejacking"
Bluejacking is a practice of sending anonymous text messages to mobile users using Bluetooth. Phones that are Bluetooth-enabled can be tweaked to search for other handsets using it that will accept messages sent to them. However, a user can avoid these messages by setting their device to "invisible" or turn off Bluetooth when not using it. Bluetooth is a protocol that allows devices such as mobile phones and laptops to send data to other devices, without wires, over distances of about 30 feet.
(Context: computer security) Slang for the act of sending (or receiving) an unsolicited message via Bluetooth. See http://www.bluejackq.com/howto.htm for a quick "how to".
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.
Keywords:  bluesnarf