HiFi Works BlueSoleil - Manual (Page 13)

2 – Basic Operations
Medium (Security Mode 2, Service level enforced security):
Authentication or Authorization is requested when a specific service is accessed by other
Bluetooth enabled devices. If two devices are connecting for the first time, or if two devices
do not have a trusted relationship, then the same passkey must be provided on both sides to
complete the Authentication. This mode allows you to assign different access rights for each
service supported by the server device.
High (Security Mode 3, Link level enforced security):
If either of two devices is in Mode 3, Authentication is requested whenever a link connection
is initiated between two Bluetooth enabled devices. The passkey must be provided on both
sides to complete Authentication.
NOTE: In Security Mode 2, the user can add each authenticated device into a trusted device list
to expedite future connections.
BlueSoleil 1.4.9 Page 10