Software-Stack-ASCII

+----------------------------------------+
|           Applikation (z.B. PAM)       |
+------------------pkcs11----------------+
|             OpenSC (PKCS#11)           |
+-----------------PC/SC------------------+
|               PC-SC-Lite               |
+---------------ifdhandler---------------+
|          Treiber (z.B. omnikey)        |
+----------------------------------------+
|              Linux-Kernel              |
+----------------------------------------+