diff --git a/pkcs11.md b/pkcs11.md
new file mode 100644
index 0000000..1b9d943
--- /dev/null
+++ b/pkcs11.md
@@ -0,0 +1,3 @@
+PKCS#11 Libraries:
+- /Library/OpenSC/lib/opensc-pkcs11.so
+- /usr/local/lib/libykcs11.dylib