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Near Field CommunicationMobile Phones

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NFC mobile phones are smart phones that use NFCtechnology.

It has multiple utilities.

Integrate applications of both contactless cards and mobilephones.

Communicate within a short distance.

Helps in easy and secure transfer of data between twosystems.

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Sharing

Pairing

Transaction

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Most obvious of the three.

NFC enabled smart phones can be used as a credit or debitcard.

Just tap your phone against an NFC-enabled reader.

IDs like driver's licenses and passports can be replaced oraugmented with NFC.

Even keys could someday become a relic of the past,replaced by the tap of a phone to a lock.

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Use like QR codes.

Tags scannable by your cellphone camera are

now use. NFC smartphone can interact either with

another active NFC device or with a passive

tag.

Without opening a new application and take a

picture.

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Reduce configuration of bluetooth.

Need not remember complex WI-FI

passwords.

Tap your phone to another phone to transfer

data.

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Public transportation

Ticketing

Keys

Comparison-shopping

"Check-ins" and venue reviews

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Short range protocol(10 cm).

- secure and transparentcommunication between

devices

Support passive mode of communication.

- energy saving.

selecting the correct device out of the multitude ofdevices in the range and providing the right parametersto the connection.

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Use NFC(Near Field Communication) technology.

For short range high frequency wireless

communication.

Based on Radio Frequency Identification(RFID).

Communicate within a distance of 10 cm.

Magnetic field induction enable communication.

It is an extension of ISO 14443 proximity-cardstandards.

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Frequency band 13.56 MHz.

Data transfer rate 424/848 kbps.

Distance of communication 20 cm.

Band width range 14 KHz.

Works via Magnetic field induction.

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NFC has 3 modes of communications

1. Peer to Peer mode

is defined for device to device link-

level communication2. Read/Write mode

allow transmission of NFC formdefined messages

3. NFC Card Emulation mode

allow the NFC-handset behave as astandard Smartcard

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Active mode

Two active devices communicate with eachother.Each device has to generate its own RF field,if itwants to send data. The RF field is alternately generatedby one of the two devices.

Passive mode

In this mode the communication takes place between anactive and a passive device. The passive device has no battery

and uses the RF field generated by the active device.

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Two type

1. MANCHESTER CODE

* use in passive mode*use in active mode

when data rate > 106 kbps

2. MODIFIED MILLER CODE* use in active mode mode

when data rate is 106 kbps

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MANCHESTER CODING

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MODIFIED MILLER CODE

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Initiator

* one who wish to communicate and startcommunication.

Target

* receives initiators request and sent back areplay.

Very less chance for collision. initiator can sent dataonly when the target is ready.

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The general protocol flow can be divided into

The initialization protocoland

Transport protocol.

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Collision avoidance.

Selection of target.

where the initiator determines the communication

mode(active or passive) and chooses the transfer

speed.

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The transport protocol is divided in three parts :

Activation of the protocol, which includes the

Request for Attributes and theParameter Selection.

The data exchange protocol, and

The deactivation of the protocol including theDeselection and the Release.

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NFC and RFID

- Both support active mode of

communication.

- Only NFC support communication b/w

active and passive devices.

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Bluetooth

- Shorter set-up time for NFC.

- NFC reduce time for manual configurations to

identify the others phone- The connection between two NFC devices is

established at once (

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Data snatching

Data destruction

Data modification

Data insertion

Avoids eavesdropping

Man-in-the-Middle-Attack

Service provider can block the NFC connection.

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Efficient technology for communication in

short range

NFC is extremely short ranged and people-

centric

Simple to transfer data between electronic

devices

NFC provides confidentiality, integrity and

authenticity

Makes life faster easier and stylish .

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