None of these represents a truly secure solution.
I would recommend you look at the new training materials being offered by BankersEdge.
True solutions are really hard to find but SSN's and dates and amounts of last deposit are to easy.
We have been testing Bank security for months offering no charge if we can't break in, if I had a dollar for every banker who has told me yes it's a problem but not at this bank or this branch I'd be rich.
You need systems AND you need to test them rigorously. We use are methods as training tools, not to beat people over the head.
Please understand ID theft is a business, the people who do it and make pretext calls to your bank are very good at what they do or they wouldn't still be making a living.
Please feel free to call if you want to know how good your systems are, the offer remains, no break in, no charge.
Matthew Read
Compliance Officers Association, Privacy Officers Association, AACFE,MICM,SHRM.