How to connect NFC and Bluetooth via matched transmission

I want to combine keyboard and android phone. I am a tag role in my EV board, not a phone. I cannot link to the android sample code.

I have already connected bluetooth via a simple tag according to the SSP specification. But my friend told me that the keyboard needs a hash key to validate. I have tried using Agreed Handoff (Tag Mode). The phone (LG G2) cannot detect the tag format.

Finial, I found that the Handover specification specified handover to use LLCP mode (P2P mode). I'm not sure about that. Rarely do people talk about keyboards and consistent handover in a tag.

My questions:

• If pair by NFC, does the keyboard need a hash key or not? If not needed, I can use simple tag mode for easy connection.
• Does the negotiated handover use LLCP mode?

Thank!!