Bluetooth Technology
What is Bluetooth?
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Bluetooth is a short- range communications
technology that allows devices to communicate with
each other without cables or wires while maintaining
high levels of security
Bluetooth tech has achieved global acceptance
The strength of Bluetooth is the ability to
simultaneously handle both data and voice
transmissions.
Ex: (hands free headset, synchronizing PDA)
How Bluetooth works?
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A Bluetooth connection is wireless and automatic. Keep
transmission power extremely low to save battery power. And
each transmission signal to and from your cell phone consumes
just 1 milliwatt of power. The big draws of Bluetooth are that it is
wireless, inexpensive and automatic. Bluetooth doesn't require
high bandwidth.
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Bluetooth is essentially a networking standard that works at two
levels:
 It provides agreement at the physical level - Bluetooth is a radiofrequency standard.
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It provides agreement at the protocol/transport level, where
products have to agree on when bits are sent, how many will be
sent at a time, and how the parties in a conversation can be sure
that the message received is the same as the message sent.
Physical Channel
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Physical is the lowest architectural layer in Bluetooth wireless
technology. All Bluetooth physical channels are characterized by an
RF frequency combined with temporal parameters and restricted by
spatial considerations.
The Bluetooth enabled devices use a shared physical channel for
communication. To achieve this, their transceiver needs to turn on to
the same RF frequency at the same time, and have to be at the
nominal range of each other.
For Bluetooth, physical layers are defined. Each optimized and used
for a different purpose.
They are:
-The basic piconet channel
-Adapted piconet channel
-Inquiry scan channel
-The page scan channel
Piconet
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Devices connect and communicate wirelessly through
short range, ad-hoc network
1 device provides the synchronization reference and
known as the master. Other devices known as slave. A
group of devices synchronized in this fashion form a
piconet.
A device may participate in two or more piconet by
using time division multiplexing
Located at physical channel and divided into two:
 Basic piconet channel
 Adapted piconet channel
Security
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Key authentication and encryption.
Many Bluetooth devices rely on 128bit
numeric PIN numbers. When Bluetooth
products identify themselves, they use the
PIN code first time they connect.
Bluesnarfing: refers to attackers using a
Bluetooth connection to steal information
from Bluetooth device
Security (cont’d)
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Bluejacking
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Allows phone users to send business cards anonymously using Bluetooth
wireless technology. Bluejacking does NOT involve the removal or alteration
of any data from the device. These business cards often have a clever or
flirtatious message rather than the typical name and phone number. Phone
owners who receive bluejack messages should refuse to add the contacts to
their address book.
Bluebugging
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Allows skilled individuals to access the mobile phone commands using
Bluetooth wireless technology without notifying or alerting the phone’s user.
This vulnerability allows the hacker to initiate phone calls, send and receive
text messages, read and write phonebook contacts, eavesdrop on phone
conversations, and connect to the Internet.
Bluetooth Mobile phone headset
Typical Bluetooth USB adapter
PCMCIA Bluetooth adapter
Typical Bluetooth antenna