Bitcoin Forum

I can input something transaction commit in Blockchain Send Meney.
but it can't input in bitcoin-qt.
and the blockchain comment is public to all.
so.. i mean... when i can input any encryption transaction comment, only the destination people can decryption it.
now, i can input my location address, my name and my mobile number when i will buy something with bitcoin.
i like it when i will send many bitcoin.

public comment text -> get recevie address public key -> encrypt(comment + sigature with my private key)
     -> send to blockchain
     -> only receive people decryption comment
     -> get transaction information(localtion or mobile number)
     -> post commodity to client