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Bluetooth

BYsandeep

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Introduction

What is Bluetooth?

What does it do?

History of Bluetooth

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Introduction (contd)

Is Bluetooth here to stay?

What should we expect fromBluetooth in the future?

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What Bluetooth Delivers to theend-user

Connects a wide range of computing andtelecommunication devices

Expand communication capabilities

Devices can communicate with each otherwith wireless connectivity

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User Application Car manufactures Industry

E-Mail / Internet / Intranet Access

Headsets

Bluetooth will facilitate Local AreaNetworks

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Bluetooth in Action

Source: http//:www.motorola.com

In the Office ...In the house

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Home Security On the Road

Source: http//:www.motorola.com

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On your Car

Source: http//:www.motorola.com

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Bluetooth Specifications

Things that you must have: Transceivers and Receivers that can send and

receive data because they use RadioWaves.

MAC Address (Physical Address) Burnt on the NIC card by the manufacturer.

PIN Number To identify the user using the device.

A Piconet

A FHHS protocol

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What is a Piconet?

A Piconet session is a communication link

that must be created between devices fordevices to communicate with each other.

This is done when the MAC address andthe PIN number match.

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Piconet (cont.)

If two devices come onto contact with eachother( 32 feet) the user will be prompted toinitiate a communication session

Users then can either deny or accept the requestto initiate a session

Only devices approved by the user can take partin the session

Data will appear as noise to unauthorized

devices (A great security feature).

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FHHS

Bluetooth devices use a protocol called (FHHS)Frequency-Hopping Spread Spectrum .

Uses packet-switching to send data.

Bluetooth sends packets of data on a range offrequencies.

In each session one device is a master and theothers are slaves.

The master device decides at which frequencydata will travel.

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FHHS

Transceivers hop among 79 differentfrequencies in the 2.4 GHz baud at a rate of1600 frequency hops per second.

The master device tells the slaves at whatfrequency data will be sent.

This technique allows devices to communicatewith each other more securely.

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FHHS Example

Source: http://www.xircom.com

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Bluetooth Security

Modes Security Mode 1

No Security Security Mode 2 Service Level Enforced Security Implemented after channel is established

Security Mode 3 Link Level Enforced Security Implemented before channel is established

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Devices

Trusted No Restrictions

Untrusted Restrictions, Access is limited

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Service Levels

Authorization and Authentication

Authentication Only

Open to all Devices

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Link Level

Bluetooth Device Address

Private Link Key

Private Encryption Key

Random Number

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Bluetooth Secure Enough?

Not enough for confidential and top secretinformation now but . . .

Security will Improve Improve exisiting security

Implement new security