BLE passkey levels

[JackDev]

Hi All, I am working on nRF51822, i have questions about BLE passkey security:

1- The pass key is for GAP or GATT services?

2- The BLE have few layers of data: Profile->Service->attribute, in which level can i set passkey?

3- Can i set different passkey to different services?

Thanks.

[Petter Myhre]

I hope this answers 1+2, if not please add a comment. On 3. the answer is no.