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Epic FAIL!

1. Target needs to be authenticated to the user. This should require some positive action, as opposed to relying on certificates which are mostly ignored and whose provenance is not as strongly assured as was initially advertised.
2. Customer needs to authenticate to the target. Passwords are not enough since humans can remember approximately 1 password only, and only if they use it constantly. The authentication should change and replays should be rejected.
3. Customer must affirm details of the transaction before it is committed. This too must use some method that is changeable and disallows playback.

Ideally a transaction will have all these elements in one idempotent package, the way for example a check might if the signature were a better biometric than it is and if the signature were checked always. That is however technically awkward on a net, so the 3 elements listed may need to be separately done. Omitting any of the elements allows different classes of attacks. If all the elements are present and tied together, attacks become very hard. Also, note, step 3 makes it largely irrelevant whether the customer is declared not-present afterwards or not. It serves also to terminate the transaction. Whether another transaction is begun or not is for the most part immaterial. (A method I have advocated to accomplish these would allow several transactions to be tied together if desired, in one session, but there would always be a "signature" or "affirmation" step for each, even if the initial authentication steps were recent enough to continue to use them.)

This needs hardware. However it can be done very cheaply; the hardware needed can in quantity be had for perhaps $3 a copy, possibly less, even as electronics. Paper approximations could be far cheaper still.

This seems like a GREAT way to lose all your money quickly.

I guess after it happens, you'll at least have something to really tweet about (as opposed to the fact you bought the new Brittney Spears album - no one cares!).

How about the very idea of banking by twitter? What twit thought THAT one up??

With tweetMyMoney, you can monitor your account balance, deposits, withdrawals, holds and cleared checks with simple commands. And, you can even transfer funds within your account. It's all available on Twitter, 24/7! And, the best part is, our tweetMyMoney service is free!

So how is this mobile? If your phone can send and receive text messages and you're on Twitter, you're in! tweetMyMoney uses Twitter's Direct Message feature to return the account information you request.

I don't need Twitter for that -- I just call the bank and talk to a human.

Now we see why the banking industry is so screwed; it's run by morons.

120 characters isn't big enough for my account balance.

Dear Vantage customer, our free joke service will send you a tweet every day with a new hilarious joke. Please tweet "#tran $1000 f1 t123456" to @myvcu to start!

Lots of OMGWTF!!! responses here, but having looked over the information they're providing (balances, holds, cleared checks, etc) and noting that there's no transmission of account numbers, PINs or other identifying information, I'm not seeing a major problem.

Just because you can have a knee-jerk reaction doesn't mean you should.

Is there a list of banks that support this? Just so, you know, the intelligent people can move their cash OUT of these banks?

I don't see the point of the service, but then I don't use Twitter.

I also don't see the point of all the critics. Everyone alludes to how easily someone can steal your money with this. Ok... how?

I see a bunch of functionality where you can monitor your account status. The only thing I see that mentions affecting your account status is transfering money within your account. I guess that's enough that you could mess with someone, but where's the profit motive? You're going to commit wire fraud just to piss someone off?

Site: https://twitpay.me/ [twitpay.me]

Basically you attach your twitter account to your paypal account, then you can send money to any other twitter user with a simple message to that effect.

Of course, the catch is that the money never actually gets transferred until you "settle" the account. It just keeps a running tally for everybody, then you settle and pay the whole shebang at once.