diff --git a/examples/mifare-ultralight-info.c b/examples/mifare-ultralight-info.c
index f27aabc..a191cea 100644
--- a/examples/mifare-ultralight-info.c
+++ b/examples/mifare-ultralight-info.c
@@ -65,7 +65,19 @@ main (int argc, char *argv[])
 
 	    char *tag_uid = freefare_get_tag_uid (tags[i]);
 	    printf ("Tag with UID %s is a %s\n", tag_uid, freefare_get_tag_friendly_name (tags[i]));
-
+	    if (freefare_get_tag_type (tags[i]) == ULTRALIGHT_C) {
+		MifareTag tag = tags[i];
+		int res;
+		MifareDESFireKey key;
+		uint8_t key1_3des_data[16] = { 0x49, 0x45, 0x4D, 0x4B, 0x41, 0x45, 0x52, 0x42, 0x21, 0x4E, 0x41, 0x43, 0x55, 0x4F, 0x59, 0x46 };
+		key = mifare_desfire_3des_key_new (key1_3des_data);
+		if (mifare_ultralight_connect (tag) < 0)
+		    errx (EXIT_FAILURE, "Error connecting to tag.");
+		res = mifare_ultralightc_authenticate (tag, key);
+		printf ("Authentication with default key: %s\n", res ? "fail" : "success");
+		mifare_desfire_key_free (key);
+		mifare_ultralight_disconnect (tag);
+            }
 	    free (tag_uid);
 	}