SFTP adapter : generating certificates

Hi Gurus,

In our project we have file to file scenarios were we are using SFTP adapter.

The authentication has to be done uding keys.

The adapter has been installed properly I can see it in nwa-> component info.

PI will be picking up files form SFTP server.

I am confused If I should be sharing PI public keys from them or they will give their public keys to me.

I am refering document,

http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/305eeb5b-81e7-2f10-d8aa-9216de04ca3e?overridelayout=true

But, I am not able to find any keys under Configuration ->Certificates and Keys for SFTP adapter.

Does it automatically comes over there or do we need to create them?

Thanks,