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Editorial Team
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Asked: 2026-05-15T12:44:53+00:00

Folks, I’m working on a certificate authentication app that will authenticate user based on

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Folks, I’m working on a certificate authentication app that will authenticate user based on CAC inserted. How do I know when the CAC is inserted / removed? I’ll be “catching” that event in C++ or Java. Thanks.

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  1. Editorial Team

    You have two options:

    1. If you go for “low level” (which you apparently want to do) is to use PC/SC level (pcsc-lite) and the SCardGetStatusChange function (or the equivalent in Java, what is javax.smartcardio.CardTerminal.waitForCardPresent())
    2. If you’re working with higher level abstractions and go for PKCS#11 (and if your PKCS#11 provider implements it correctly), C_WaitForSlotEvent can be used.
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