74 Kaba Ilco Lodging Access Control System
Chapter 4: Keycards
4.1 The Secure Keycard Combination
The Front Desk Unit can encode a virtually endless stream of combinations on the
keycards for each keying level in the property. The combinations are based on time, so
they will not repeat during the useful life of the product. The combination is encrypted so
that even by analyzing many keycards in sequence, it cannot be deciphered and a future
combination projected.
The combination contains information which distinguishes the level of the keycard, the
property to which it belongs (the "Hotel Code"), the Front Desk Unit on which the
keycard was encoded, the keycard's time stamp, the expiry date and time, the sequence id
of the keycard and the identity of the person whose Authorization keycard was used to
make the keycard. This encrypted information has billions of possible combinations,
which prevents a keycard from opening a door for which it has not been programmed.
4.2 The Major Categories of Keycards
There are 5 major categories of keycards, each with a distinct function according to the
following table. All keycards are encoded using the FDU. The individual keycards in
each category are fully described in Section 4.10 – Keycard Reference. Individual
keycards are also listed in Appendix A - Keycard Quick Reference Chart.
Keycard Category Function
Entry Grants guests or staff access to permitted doors.
Authorization Grants staff access to the menus of the FDU.
Lockout Locks out specific rooms or combinations of rooms.
Special Purpose Used to program locks and perform other procedures.
Reset
Cancels a circulating keycard or changes variable lock
addresses (Section/Floor/Group/Zone/Area).
Table 4.2: Major categories of keycards
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