What about a hotel with 300 rooms? Hotels have long changed to credit cards in lieu of metal keys for several years skipping 4-digit PIN. Those plastic access cards are much harder to hack or break than 4-digit PIN. Hotel management across the world can no longer operate the hotel without such a system using plastic access cards to unlock a guest room. These cards are in fact a simple plastic board imprinted of a circuit that contains a many digit PIN (many more than 4 digits). Both cards and door locks can be set or reset from the hotel reception desk in a fraction of a second.
Why not apply the same hotel access card system to other organisations or high-end domestic houses? Yes, we will explain such an application here. See the topics on the Top RHS of the screen.
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