Gérald Arnould avatar Gérald Arnould committed 7ee5dd9

Corrections in the BT justification paragraph

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2012-UBIROADS-TUDOR.tex

 requests at the end of the transaction.
 
 The fact that the coverage using Bluetooth is quite limited is not a problem
-in our case. As explained just before the Bluetooth authentication is only
+in our case. Bluetooth authentication is only
 performed at a pickup point between a driver and one or several passengers.
-Moreover, almost all todays smartphones are Bluetooth capable (not yet
-the case with the NFC technology).
+At that time, all the participants to the authentication session are in close
+range anyway.
+Moreover, most of todays smartphones are equipped with Bluetooth communication
+capabilities, and it is not yet the case with other protocols such as NFC or
+ZigBee.
 Another advantage arises from this choice: the peers
 authentication step does not require any GSM connection. The only condition
 is that all participants have beforehand the necessary vCards.
 
 Of Course, the process that we just described is independent of the communication
-layer. Any other system than the Bluetooth can be used.
+layer, and Bluetooth can be replaced by any other protocol offering the same
+level of service for messages transport.
 
 
 \subsection{Authentication of a transaction in a MAS Network}
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