Classic Electronics Smart 4F Spezifikationen PDF herunterladen (Seite 11)

Smart Cards Lab COMPGA12 University College London

8 How to Identify a Smart Card

Here there is no command. The command is to physically RESET the card

(for example switch the power oﬀ and on, or connect RESET contact C2

to VCC for a short while). Then the card responds with a string of bytes.

This is called ATR = Answer To Reset.

Quiz ATR is a nested structure deﬁned in

ISO 7816-1 ISO 7816-3.

ATR is a sort of unique ID of a smart card product. For example ATR is

equal to 3B8F8001804F0CA000000306030001000000006A for MiFare Classic

used in the London Oyster card. A tool to identify the type of the smart card

from its ATR can be found at http://smartcard-atr.appspot.com/.

8.1 How to get ATR

Most smart card programs are able of displaying the ATR.

1. For example we can run SCardDemo.exe which will display ATR if

we press the button RESET.

it is included in our software distribution folder under is provided in

the folder \APDUtools\SCardDemo.exe. This program does not

require any installation and can be run directly.

2. A nice tool is PCSC diagnostic that comes with the free SpringCard

tools suite that comes with our lab installation. It will automatically

detect if a card was inserted and display the ATR.

3. Another method is to use cardselect.py or isotype.py that come with

rﬁdiot library. The second program gives some extra explanations

about the structure and the encoding of the ATR, as shown below.

4. And many other... including most APDU tools we have listed in Sec-

tion 4.4.

8.2 Getting ATR With Rﬁdiot

Open a console box (cmd.exe, can for example be opened by clicking here:

file:///C:/windows/system32/cmd.exe) and type the following:

cd C:\Program Files\rfidiot

isotype.py

Nicolas T. Courtois 2009-10

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Classic Electronics Smart 4F Spezifikationen Seite 11