Dear, I want to build a project which is based on online banking. I am going to use sms transaction facility such as to withdraw or transfer money. So when any user sends a sms with his acc. no. to another acc. no. then how the computer knows or microcontroller knows the accpount nos?
"some sends sms to transfer money"
Transferring is one thing, but you specifically mentioned withdrawing cash - how do you propose to do that?
Are you thinking of "eCash" - like Per's suggestion?