Securing BLE device

[gaminn]

Hi,

on NRF51 BLE peripheral I want to implement authentication, so only selected BLE masters have access to my BLE peripheral.

1. There is a password known to BLE peripheral and BLE master.
2. In secure environment BLE master writes password to public GATT characteristic of BLE peripheral.
3. If the password is correct only then BLE peripheral allows bonding and stores bonding information. Now, BLE master has access to private GATT characteristic.

Can you please help with implementation of this?

[Petter Myhre]

I don't understand, if we assume we pair in a secure environment, there is no hacker there.