http://www.ohgizmo.com/2006/08/09/sipix-smart-cards/ Deliciously Geeky... Sat, 21 Nov 2009 23:25:08 -0600 http://wordpress.org/?v=2.8.4 hourly 1 http://www.ohgizmo.com/2006/08/09/sipix-smart-cards/comment-page-1/#comment-27751 Thomas Paine Wed, 09 Aug 2006 17:40:27 +0000 http://www.ohgizmo.com/2006/08/09/sipix-smart-cards/#comment-27751 Interesting idea, but I'm curious about how unique the number is. I'm assuming that the number isn't transmitted from the card to the bank, so how does the bank match up the number on the card with the one you type into a website? It seems to me that it would be some sort of algorithm based upon the credit card number and the date. Once the algorithm is figured out it will be useless because all the cards sent out have already been hard coded. They must have thought up something creative to thwart this but I'm at a loss to see what it is. Interesting idea, but I’m curious about how unique the number is. I’m assuming that the number isn’t transmitted from the card to the bank, so how does the bank match up the number on the card with the one you type into a website? It seems to me that it would be some sort of algorithm based upon the credit card number and the date. Once the algorithm is figured out it will be useless because all the cards sent out have already been hard coded. They must have thought up something creative to thwart this but I’m at a loss to see what it is.

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