Public mainframe system

On 4/18/2013 2:23 PM, Dave McGuire wrote: If you make the example being at one bank, and having no security, or other safeguards. There are steps to verify remote balances, security in all the data exchanges, pin verification, just to name a few things that go beyond the basic list of actions here. There is usually a posting against the account for debit / withdrawals depending on the nature of the transaction as well, if you go outsides the bounds of ATM operations. Then it gets all hinked up into the Verifone pad and all that crap, doing a verification or hold on the account, then posting a results. Lots of transactions and in the case of just a withdrawal from a non accountholding bank you have to also do it quickly for an ATM, as the human can't be bothered to hang around a long time. the debit card transactions are done by distributed processing and it has been recently demonstrated that the distribution introduces about a 10 minute latency in syncing data, so the transactions are no longer atomic, but can be scammed to produce fraud with swiped cards. and on and on. Late in the day, just had to make this thread one or two longer.