Presentation describing about NFC used in decentralized shopping

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3. INTRODUCTION
 Need for upgrades in e-Commerce
 M-Commerce -> Next Gen e-Commerce
 Applications of m-commerce in day to day needs
 Technologies incorporated to enhance it
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4. What is NFC?
NFC is a short range high frequency wireless communication technology.
A radio communications is established between devices that either touch
or are momentarily held together.
NFC is mainly aimed for mobile phones or handheld devices.
NFC is an extension of Radio Frequency Identification (RFID) technology.
NFC offers safe yet intuitive communication between electronic devices.
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5. Operation of NFC
Passive Communication mode Active Communication mode
 Initiator device provides a carrier field
and the target device answers by
modulating existing field.
 Here, the target device may draw its
power from the initiator provided EM
field.
 Both initiator and target devices
communicate by alternately
generating their own fields.
 Here, both devices typically need
to have a power supply.
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6. How NFC works?
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

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7.  Commerce
 Bootstrapping other connections
 Social networking
 Identity and access tokens
 Smartphone automation and NFC tags
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8. Allows users to purchase products on physical stores in a fully decentralized
unassisted fashion
Uses a new type of electronic article surveillance (EAS) tag embedded with
near field communication (NFC) capabilities
Goal is to provide a low-cost, alternative sales model
Designed to eliminate any user-terminal interaction
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9.  SALES MODEL DESCRIPTION
 NFC-ENABLED EAS TAG DESIGN
 PAYMENT PROTOCOL DESCRIPTION
Decentralized Checkout System
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10. SALES MODEL DESCRIPTION
This section describe our alternative sales model
Enables buyers to perform decentralized purchases by using their own mobile
devices
This involves some initial set up steps like
• connecting to Shop’s WiFi network
• Downloading Shop’s purchase application (app)
• Creating a user account and setting up her preferred payment methods 10

11. SALES MODEL DESCRIPTION
 It Checkout System includes 4 steps :
I. Connecting Tag to the Smart Phone
II. Acquiring the Product information
III. Payment
IV. Deactivating the Tag
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12. Product
Bar
code
Tag
NFC Enabled Device
t id
p id
P id
t id
P info
Paymentt key
t key
ack
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13. tid tkey
ttmr tctr
Logic
Power Supply
tsts
EAS
Device
Diversity
Circuit
Antenna
NFC
Device
NFC + EAS
TAG
NFC-ENABLED EAS TAG DESIGN
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14. NFC-ENABLED EAS TAG DESIGN
 The tag comprises an antenna,which is common both to its NFC and
EAS functions
 Diversity circuit enables the tag to work with near field signals , as well
as the far field frequency employed by current anti-theft portals
 NFC Tag does the energy harvesting using the power supply module.
 Logic part comprises a simple state machine implementing a sub-set of
the SNEP protocol
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15. NFC-ENABLED EAS TAG DESIGN
 SNEP - Simple NDEF Exchange Protocol
 Allows two NFC devices to exchange NDEF Messages
 NDEF - NFC Data Exchange Format , It consists of NDEF
Messages and NDEF Records
 SNEP is a stateless request/response protocol(PUT/GET)
 The receiver uses acknowledge to avoid exhaustion of the
limited NFC bandwidth (CONTINUE/REJECT)
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16. NFC-ENABLED EAS TAG DESIGN
 Identical current consumption and processing times
 Lockout timer ttmr and a Counter tctr ,which renders malicious
successive attempts
 tkey is not computable by the client from any available information
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17. PAYMENT PROTOCOL DESCRIPTION
 Describes how system is designed to interact with third-party payment
service providers(PSP)
 The payment protocol includes Client C and Store S, and enabled by
an external Payment service provider P
 Uses Platform-as-a-Service (PaaS) framework for payment
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18. Receipt , t key
Trans_Conf, OK
Trans_Conf
Purch_Req, C ID, S ID
Purch_Req, C ID
Trans_Conf
Trans_Conf, OK
Trans_Success, OK
BUY ITBUY IT
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CLIENT STORE PSP

19. PAYMENT PROTOCOL DESCRIPTION
Steps Involved in Payment
 Purch_Req and Cid is retrieved from C
 Connection established between S and P to forward info from C
along with Sid
 P will reply to S with a request Trans_Conf, which will be
forwarded to C
 C verify its validity and reply with a Trans_Conf,OK authorization 19

20. PAYMENT PROTOCOL DESCRIPTION
Steps Involved in Payment
 P will transfer the funds from C’s to S’s account and reply with
Trans_Success,OK
 S will verify the outcome of the transaction and issue C’s
electronic receipt Receipt and tkey
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21. CONCLUSION
 Eliminating buyer’s need to enter a line in order to complete their purchase
 The vulnerability of the user privacy has been eliminated
 Proposed tag’s design reduce both implementation costs and risk of fraud
 Relies on already-deployed multiple purpose devices on the client side
 Traditional EAS models is compatible with the proposed solution, thus
essentially reducing migration costs to software implementation and
personal training.
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22. Future Scope of Research
 NFC on the smartphone becomes an all in one payment device
 NFC chips and tags are so small and lightweight that they could
eventually be integrated into posters,notice boards,ads etc
 NFC embedded SIM cards to make more compatible
 NFC has implications for the healthcare like diagnostic tags,tag
embedded into patient’s chart
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23. REFERENCE
 NFC-enabled decentralized checkout system,Orlando Volpato Filho,Mobile
Computing Department,SAMSUNG Research Institute Brazil,Campinas/SP, Brazil
Fabio Piva,Mobile Computing Department,SAMSUNG Research Institute
Brazil,Campinas/SP, Brazil
 Simple NDEF Exchange Protocol. NFC Forum, technical specification (aug, 31). 2011
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24. THANK YOU
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