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A key unique to a device known as "Device Key" is derived from elliptic curve shared secret on provisioner and device during the provisioning process. This device key is used by the provisioner to encrypt messages for that specific device.
Security of provisioning process has been analyzed in a paper presented during [[IEEE Communications Society|IEEE CNS]] 2018 conference.<ref>{{Cite journal|last=Adomnicai|first=A.|last2=Fournier|first2=J. J. A.|last3=Masson|first3=L.|date=2018-05-30|title=Hardware Security Threats Against Bluetooth Mesh Networks|journal=2018 IEEE Conference on Communications and Network Security (CNS)|volume=|pages=1–9|url=https://ieeexplore.ieee.org/document/8433184|doi=10.1109/CNS.2018.8433184|isbn=978-1-5386-4586-4}}</ref>
The provisioning can be performed using a Bluetooth GATT connection or advertising using the specific bearer.<ref name=":0" />
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