1 00 00 00 00
2 00 00 00 00
+=head1 Security
+
+AFI byte on RFID tag is used for security.
+
+In my case, we have RFID door which can only read AFI bytes from tag and issue
+alarm sound or ignore it depending on value of byte.
+
+=over 8
+
+=item 0xD7 214
+
+secured item (door will beep)
+
+=item 0xDA 218
+
+unsecured (door will ignore it)
+
+=back
+
+
=head1 METHODS
=head2 to_hash