Hello,

2009/9/23 Linux User <[email protected]>:
> When a contactless smart card transmits data stored on a smart card to a
> contactless smart card reader, is the wireless communication between the card
> and the reader encrypted?

What is your threat model?
What do you want to avoid and why?

You can have a look at Mifare [1].

You should define what exactly is "contactless" for you. Many smart
card technologies are contactless but are different. See [2].

[1] http://en.wikipedia.org/wiki/MIFARE
[2] http://en.wikipedia.org/wiki/Radio-frequency_identification

-- 
 Dr. Ludovic Rousseau
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