BluetoothByBy

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Bluetooth is a standard for the short-range wireless interconnection of mobile phones, computers, and other electronic devices.

What is Bluetooth

History Of Bluetooth:

* Bluetooth was invented in 1994 by Ericsson. * The company later started working with a larger group of

companies called the , Bluetooth Special Interests Group “SIG" to develop the technology into what it is today.

* Bluetooth is not owned by any one company and is developed and maintained by SIG.

* The name Bluetooth came from a code name originally used by SIG for the project and is a reference to a 10th century Danish king named Harold Bluetooth, who was responsible for uniting Norway, Sweden, and Denmark

Connects a wide range of computing and telecommunication devices

Expand communication capabilities

Devices can communicate with each other with wireless connectivity

What Bluetooth Delivers to the end-user

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

receive data because they use Radio Waves. MAC Address (Physical Address) PIN Number

To identify the user using the device. A Piconet A FHSS protocol

Bluetooth Specifications

A Piconet session is a communication link that must be created between devices for devices to communicate with each other.

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

What is a Piconet?

If two devices come onto contact with each other( 32 feet) the user will be prompted to initiate a communication session Users then can either deny or accept the request to initiate a session Only devices approved by the user can take part in the session Data will appear as noise to unauthorized devices (A great security feature).

Piconet (cont.)

Bluetooth devices use a protocol called (FHSS) Frequency-Hopping Spread Spectrum . Uses packet-switching to send data. Bluetooth sends packets of data on a range of frequencies. In each session one device is a master and the others are slaves. The master device decides at which frequency data will travel.

FHSS

Transceivers “hop” among 79 different frequencies in the 2.4 GHz baud at a rate of 1600 frequency hops per second.

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

This technique allows devices to communicate with each other more securely.

FHSS (Cont.)

FHSS Example

Circuit Diagram

T7024 IC

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

Bluetooth Security

Not enough for confidential and top secret information now but . . .

Security will Improve Improve exisiting security Implement new security

Bluetooth Secure Enough?

Advantages of Bluetooth Low power consumption Low price on Bluetooth components Non line-of-sight

Disadvantages of Bluetooth It only allows short range communication

between devices Possibility of interference on 2.4GHz

frequency band

Pros and Cons

The technology that propels you into a new dimension in wireless connectivity.

It is a rapid growing technology that makes man easy to transfer his electronic equipments from one place to another.

Conclusion