1. PROGRESS
서재희

2. Contents Bluetooth Secure Simple Pairing Using NFC
BLE Progress (Exchange Business Card Service)
Further Work

3. Overview Bluetooth Secure Simple Pairing(SSP) using NFC
Bluetooth Core Specification Version EDR(Enhanced Data Rate)
Data exchange : Extended Inquiry Response(EIR)

4. Device Selection Securely Connect
By providing the Bluetooth address and other optional parameters related to a specific Bluetooth-enabled device.
Securely Connect
SSP provides a stronger level of security.
The information can be exchanged over an NFC link to be used as part of the OOB pairing process.

5. SPP
Secure Simple Pairing
Cryptographic analysis

6. Phase 2 : Authentication Stage1
Protocols
Numeric Comparison
Out-of-Band
Passkey Entry

7. Out of Band Protocol Term Definition Cx Commitment value from device x
Used to generate the 128-bit commitment values Ca and Cb Nx
Nonce (unique random value) from device X
PKx
Public Key of device X rx
Random value generated by device X

8. OOB Data

9. Exchange Business Card Service
Role Switching
Within 1s
Maximum repeat# : 5
Advertising Msg
More Battery Level : Central Role
Instead of Mac address

10. Sequence Diagram

11. Role Switching & Adv/Scn

12. Service packet Service ID Seqeunce no. : total no. (4bits : 4bits)
Data Length
Data
0x09
(1:3) n
Name(string)
(2:3)
Company(string)
(3:3)
Telephone(string)

13. Adv/Scn Problem Need to optimize the Adv/Scn time.
If there are many people for Exchange Business Card.
RSSI : above 30cm and below 1m
Other method
Need to measure Sending time.

14. Further Work Version2 Use Battery Level Solve a problems
Measure the connection probability