BLE pairing (explained earlier in this chapter) starts by a device initiating a Pairing_Request and exchanging capabilities, requirements, and so on. Nothing involving security profiles occurs at the initial phase of a pairing process. For that matter, the pairing security is similar to the BR/EDR four methods (also known as association models), but differs slightly in Bluetooth BLE 4.2:
- Numeric comparison: This is the same as Just Works, but at the end, both devices will generate a confirmation value that is displayed on the host and device screens for the user to validate the match.
- Passkey entry: Similar to BR/EDR mode, except that the non-initiating device creates a random 128-bit seed called a nonce to authenticate the ...
