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2.5.3 Security
This feature supports security functions laid down in the Bluetooth standard. The Bluetooth
security is divided into authentication and encryption.
These are realized by the use of PassKey (otherwise known as PIN code). PassKey is a shared
(common) authentication key used when forming a connection and trust relationship (bonding)
with Bluetooth equipment. A maximum of 16 characters (in ASCII code) can be used, but there
may be limitations on the no. of digits and usable characters due to the specifications of partner
Bluetooth equipment. Also PassKey input must be done within 30 seconds from a time when
PassKey input request is generated. Note that PassKey input is not required once “device trust”
has been established with Bluetooth equipment in previous connection. However, the partner
Bluetooth equipment must have also the trust relationship in memory.
Encryption is carried out using a link key generated after PassKey exchange and a cipher key
generated from a 128-bit random number. Here, the partner Bluetooth equipment also must
support the encryption. PassKey exchange is required for Bluetooth connection when encryption
is set enabled.
2.5.4 COM Port
The following is the COM ports used with the Bluetooth.
Table 2.66
Serial Profile (Client)
Serial Profile (Server)
COM6 / COM7
DUN (Dial-Up Network) COM7
Simultaneous use of multiple Bluetooth COM ports
Multiple Bluetooth COM ports can be opened simultaneously to use.
At this time, specify COM port at each Bluetooth devices.
About procedure of connection using multiple Bluetooth devices in Microsoft Stack, please refer
the following URL.
http://msdn.microsoft.com/en-us/library/aa916877.aspx
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