![]() Most smart card readers have utilities that enable you to see the ATR. To trouble shoot, you must first know the ATR of the specific card you are trouble shooting. If any of these values is incorrect, the crypto subsystem will not be able to associate the correct dll with the card, and fail to read the certificates from the card or be able to authenticate to it. ![]() The 80000001 value is where the actual minidriver.dll is located. That is because a minidriver is specifically designed to work with the Microsoft Smart Card providers (it is what makes it a “mini” driver). The Crypto Provider and Smart Card Key Storage Provider entries are always going to be shown for a mini driver smart card. In the example above, all parts are significant. The ATR Mask tells Windows to look only at the significant parts of the ATR. In this context it serves to identify the smart card. The ATR is the “Answer To Reset” string provided by the smart card. Each key generally has the following entries: ![]() Under the SmartCards key is a list of the smart cards that Windows recognizes.
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