Sony VAIO VGN-CS - Manual (Page 68)

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Using Your VAIO Computer >
Using the Bluetooth Function
Bluetooth Security
The Bluetooth wireless technology has an authentication function, which allows you to determine with whom you choose to
communicate. With the authentication function, you can prevent any anonymous Bluetooth devices from accessing your
computer.
The first time two Bluetooth devices communicate, a common passkey (a password required for authentication) should be
determined for both devices to be registered. Once a device is registered, there is no need to re-enter the passkey.
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The passkey can be different each time, but must be the same at both ends.
For certain devices, such as a mouse, no passkey can be entered.