What is the meaning of OOB(Out Of Band)??

[JoonDong]

I don't understand OOB used in BLE security part.

Is this a communication out of 2.4 ~ 2.48 GHz frequency band?

Or is this one of method of pairing procedure(to generate TK)?

Please let me know about OOB Authentication Data and OOB Procedure.

[Øyvind]

"Out of band" in this context mean any method not involving transferring the data over the Bluetooth link. It can be, as mentioned above, over NFC, but it can also be any other protocol or anything else you can imagine, including hardcoded data from factory.

[JoonDong]

Thank you. @.@