type of card !

The fear of every surveillance society: citizens protecting their own privacy with strong cryptography

type of card !

Post by xzos on Wed Jul 24, 2013 8:20 pm
([msg=76597]see type of card ![/msg])

Hi everyone,
can someone tell me which type of card is this ?? (i know it's a subway card, but i want to know how it works)

http://imageshack.us/photo/my-images/199/3c1i.jpg/
http://imageshack.us/photo/my-images/837/mt7g.jpg/
http://imageshack.us/photo/my-images/585/0huy.jpg/

Thanks.
xzos
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