BlueMod+B20/BT2.1 - Stollmann

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BlueMod+B20/BT2.1 User Guide B20 Remote device Display only Display Yes/No Keyboard only No input no output Display only Just Works (numeric comparison, both automatic confirmation) Numeric comparison (both displayed, one automatic confirm) Passkey entry (one display, one input) Just Works (Numeric comparison, both automatic confirmation) ATS406=0 No MITM protection No MITM protection MITM protection No MITM protection SSPPIN Display Yes/No Numeric comparison (both displayed, one automatic confirm) Numeric comparison (both displayed, both confirm) Passkey entry (one display, one input) Just Works (numeric comparison, both automatic confirmation) ATS406=1 No MITM protection MITM protection MITM protection No MITM protection SSPCONF ? SSPPIN AT+SSPCONF , 1 Keyboard only Passkey entry (one display, one input) Passkey entry (one display, one input) Passkey entry (both input) Just Works (numeric comparison, both automatic confirmation) ATS406=2 MITM protection MITM protection MITM protection No MITM protection SSPPIN ? AT+SSPPIN , SSPPIN ? AT+SSPPIN , SSPPIN ? AT+SSPPIN , No input no output Just Works (numeric comparison, both automatic confirmation) Just Works (numeric comparison, both automatic confirmation) Just Works (numeric comparison, both automatic confirmation) Just Works (numeric comparison, both automatic confirmation) ATS406=3 No MITM protection No MITM protection No MITM protection No MITM protection Green color: B20 output message SSPPIN ? (example) Blue color: B20 input request : AT+SSPPIN (example) Release r02 www.stollmann.de Page 14 of 33
BlueMod+B20/BT2.1 User Guide 3.1 SSP Connection Examples with BlueMod+B20 The following flow charts will give an example for the different SSP authentication methods “just works”, “numeric comparision” and “passkey entry” within an active outgoing call request from the BlueMod+B20. Onto these flow charts the local Bluetooth device (BT device A) and the destination side (BT device B) are configured with a BlueMod+B20. The destination can be changed to each other Bluetooth 2.1 device. The “Application” part will simulate the device at the end (DTE) which communicates to the local Bluetooth device with configuration commands. The box called “AIR” will signal which part of communication will be transmitted over Bluetooth to the destination side. The interesting part of the bonding procedure is placed between the yellow boxes “start of bonding procedure” and “end of bonding procedure”. All serial commands between the “Application A/B” and the “BT device A/B” out of the bonding procedure are used for further configuration of SSP. The configuration commands and responses within the flow charts are described in the BlueMod+B20/BT2.1 AT Command Reference. Release r02 www.stollmann.de Page 15 of 33
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BlueMod+B20/BT2.1 - Stollmann

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