nfc is a short –range wireless connectivity · passive communication mode the initiator device...
TRANSCRIPT
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MACE, Kothamangalam
NFC is a short –range wireless connectivityRange within few centimetersUp to 20 cmTwo devices are literally “touch” one anotherThe interface can operate in several modesUsed in: payment & ticketing, electronic keys, identification etc….
MACE, Kothamangalam
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MACE, KothamangalamMACE, Kothamangalam
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MACE, Kothamangalam
UARTFIFO buffersMicrocontrollerAnalog circuitryRF level detectorContactless Host interface
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MACE, Kothamangalam
Passive Communication Mode
The Initiator device provides a carrierThe Target device answers by modulating existing fieldTarget device act as a transponder
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MACE, Kothamangalam
Active communication mode
Both Initiator and Target device communicate by generating their own field
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MACE, Kothamangalam
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MACE, Kothamangalam
NFC BENEFITS OF NFC
BLUETOOTH IR
N/W TYPE Point-to-point Pairing= bringing
close
Point to multipoint
Point-to-point
RANGE <0.1m Suitable for crowded
areas
10m 1m
MAX SPEED 1 mbps faster 721 kbps 115 kbps
SET-UP TIMES
<0.1 s Fast transaction
6 s 0.5 s
MODES A-A, A-P Reader & card
A-A A-A
COMPATIBLE WITH RFID
yes Can use existing
infrastructure
no No
COST low Affordable for most devices
moderate low
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MACE, Kothamangalam
MOD ULA TION S CHEME
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MACE, Kothamangalam
NFC enabled mobiles
Nokia 6280 Motorola A925 Sony Ericsson K750i
Maximum Reading Range: 68mm 68mm 45mm
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MACE, Kothamangalam
Eavesdropping RF filed characteristic of the given sender
device Characteristic of the attacker’s antenna Quality of the attacker’s receiver Quality of the attacker’s RF signal decoder Setup of the location where the attack is
performed Power sent out by the NFC device
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MACE, Kothamangalam
Data corruption Modification of data send by NFC Achieved by transmitting valid freq of the
data spectrum a correct time No manipulation possible
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MACE, Kothamangalam
Frequency band available worldwide as an ISM frequency At this frequency transponders are very cheap and easy to manufacture.Minimal shielding effects from adjacent objects and the human body
Damping effects of water relatively small, field penetrates dense materials
Excellent immunity to environmental noise and electrical interference
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MACE, Kothamangalam
Touch and goTouch and confirmTouch and connectTouch and explore …….
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MACE, Kothamangalam
Availability for all applications Lower cost (less complex, circuit size, …) Better performance Low-power encryption
ensures all sensitive data is not disclosed to unwelcome third parties Easy to operate, simply hold closer Both powered & non powered
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MACE, Kothamangalam
Uniform support for standard applications Enable security-sensitive applications by adding Setting up membership to networks Managing privacy-sensitive information
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MACE, Kothamangalam
Smart Touch introduces the next connected experiences Focus on improved security and privacyAvailability of NFC enabled handsets will be critical in gaining user baseNFC can bring together information, payment and
location through the medium of mobile phone
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