25 Sep '12, 7am

Slashdot: Mintchip is designed to track you by Anonymous Coward #bitcoin

it's about time I clear my conscience... The system keeps track of what funding sources you've been "in contact" with, kinda like Bitcoin's idea of "taint" The implementation is quite clever, involving some modular arithmetic and the 24-byte "Transaction Authentication Code" detailed in the Mintchip Messages [mintchipchallenge.com] documentation. Or I should say, revealed... of course they're not telling you what the TAC does because they don't want to admit it's true purpose. It's also not just the TAC, all those supposedly random nonces generated by the hardware aren't going to be as random as you'd think. Basically you can use them as an additional way of stenographically hiding data between transactions that goes way beyond what they document. I can't reveal too many details on how it works as they'd probably figure out who I am, but essentially that's enough bits to e...

Full article: http://news.slashdot.org/comments.pl?sid=3051283&cid=4100...

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