Re: Encryption of data in smart cards

[Anne & Lynn Wheeler]

there are a large number of different kinds of cards .... however the most 
prevalent smartcards (in terms of numbers deployed) are the institutional 
smartcards that tend to include stored-value  of various kinds that are 
supported at various kinds of merchant &/or transient terminals (i.e. 
subway turnstyles). the transient tend to be proximity/contactless 
(aka  iso14443) rather than contact (aka iso7816).

these infrastructures use secret keys .... especially derived secret keys 
... that are designed to protect the infrastructure from various kinds of 
attacks by others (including the people that posses the card) ... typically 
fraudulent value substitution on the card.
--
Anne & Lynn Wheeler    http://www.garlic.com/~lynn/
Internet trivia 20th anv http://www.garlic.com/~lynn/rfcietff.htm
 

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