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2. Access badge - Wikipedia

   en.wikipedia.org/wiki/Access_badge

   The number is sent to an access control system, a computer system that makes access control decisions based on information about the credential. If the credential is included in an access control list, the access control system unlocks the controlled access point. The transaction is stored in the system for later retrieval; reports can be ...

3. Keycard lock - Wikipedia

   en.wikipedia.org/wiki/Keycard_lock

   However, if the card readers communicate with a central system, it is the system that unlocks the door, not the card reader alone. [3] This allows for more control over the locks; for example, a specific card may only work on certain days of the week or time of day. Which locks can be opened by a card can be changed at any time.

4. Proximity card - Wikipedia

   en.wikipedia.org/wiki/Proximity_card

   A proximity card controlled turnstile A passive proximity card with the plastic casing opened to show components: antenna coil and integrated circuit (black object bottom center) Anatomy of proximity card: coil and IC The proximity card coil of an electronic fare collection system. A proximity card or prox card [1] also known as a key card or ...

5. Access control - Wikipedia

   en.wikipedia.org/wiki/Access_control

   There is no wasted capacity when using IP readers (e.g. a 4-door controller would have 25% of unused capacity if it was controlling only 3 doors). IP reader systems scale easily: there is no need to install new main or sub-controllers. Failure of one IP reader does not affect any other readers in the system. Disadvantages: [citation needed]

6. Mantrap (access control) - Wikipedia

   en.wikipedia.org/wiki/Mantrap_(access_control)

   For example, a key may open the first door, but a personal identification number entered on a number pad opens the second. [5] Other methods of opening doors include proximity cards or biometric devices such as fingerprint readers or iris recognition scans. Time of Flight sensors are used in high security environments.

7. Physical security - Wikipedia

   en.wikipedia.org/wiki/Physical_security

   Electronic access control systems provide secure access to buildings or facilities by controlling who can enter and exit. Some aspects of these systems can include: Access credentials - Access cards, fobs, or badges are used to identify and authenticate authorized users. Information encoded on the credentials is read by card readers at entry ...