confidentiality between bluetooth devices and their pairing only with their respective trusted devices

[deek]

Hi team,

Is unique pairing i,e permanent pairing of bluetooth devices possible, which means confidentiality between bluetooth devices and their pairing only with their respective trusted devices possible irrespective of ay other devices in their surroundings.

Best regards 

Deek

[Hung Bui]

Hi Deek, 

I'm not so sure I fully understand what you meant by "unique pairing" and " permanent pairing". 

When two Bluetooth devices bond after pairing  they share the keys and can therefore recognize each other and reconnect and re-encrypt the link without doing pairing again. 

A device can use the keys and address it receive in the bonding process to allow only the devices in the list can connect to it. This way other devices in their surrounding can not connect to the device except for devices that previously bonded. This is called Accept listing (formerly called whitelisting)  

Does this cover what you are asking about ? 

[deek]

Thankyou hung, well i wanted to convey about how permanent connection can be established between a BLE central and peripheral device wherein another peripheral device should not bond to the same central device (something like MAC ID for that particular peripheral device should sync with that particular central device only) is that possible

[Hung Bui]

Hi Deek, 

Yes you can use an accept list for that. 

However, it's still possible that other device may try to connect to your device. But your device will reject those connect request. 
This also mean an unwanted device(s) can keep trying to connect to your device and may block the connection from the previously bonded device. 

Note that to use the accept list, you would need to use Accept list filter when advertising. 

[deek]

Well this helped a lot indeed, Thanks a bunch hung!

Best regards

Deek