Security Glossary

Security Acronyms and phrases

  • A
    • Antipassback - A security measure that prevents someone's Access Token being passed back to the person behind to use. Usually implmented by setting a minimum time before that card can be reused on that door / gate etc.
  • B
  • C
    • CCTV - Closed Circuit Television. The system that records images and sound and saves them for replay later in the event of an incident. The images are usually time and datestamped as well as having their location overlaid on the image.
  • D
    • "CRB / DBS" Criminal Records Bureau / Disclosure & Barring Service. Many places now require staff to be CRB / DBS checked. All First Aid personnel should be DBS vetted.
    • Door Monitor Contact - A sensor that detects whether or not a door is open. Can be used to create a 'Door Forced' alarm or to shorten a door release time once it detects that the user has opened the door.
    • Door release time - the length of time that a door remains open after a valid Access request. Can be adjusted on a door-by-door basis and also cancelled once that it is detected that the door is open to prevent tailgating
  • E
    • Egress - another word for Exit
  • F
    • Fail Safe / Fail secure
      • Used for describing what happens when power is removed from an electric lock. Some locks (such as a magnetic lock) will only lock a door when it has power. Remove the power and the door unlocks, making it a safe door to exit in an emergency (power can be linked to the fire system to automatically releasre the door for instance). Other locks remain locked until you apply power meaning that it stays secure. For instance, if you have a secure room (e.g. computer room / room with Safe in), then you may wish to have the room stay secure if there is a power failure. If you didn't, then a nefarious character could 'pull the plug' and walk in freely. This is a 'fail secure' type lock.

        Note that you can still exit a fail secure room in an emergency provided that there is a mechanical way of exiting (e.g. a door handle) - you just cannot enter.
      • Fail safe lock - the door allows you to safely exit if there is no power
      • Fail secure lock - the door keeps the room secure if there is no power.
  • G
  • H
    • HSE - The Health and Safety Executive
  • I
  • J
  • K
  • L
  • M
    • Mifare - A card reader technology ownd by NXP Semiconductors. Based on the ISO/IEC 14443 Type A 13.56 MHz contactless smart card standard.
  • N
    • NC / NO - Normally Closed / Normally Open. Relates to a relay contact and the state that it is in when no power is applied to the relay coil
  • O
  • P
  • Q
    R
  • S
  • T
    • Tailgating - the practice of an unauthorised person slipping through a door or gate behind someone that has use a valid token
    • Tamper circuit - often a microswitch that detects whether a container has been opened. This can set off an alarm
    • Turnstile - a mechanism for controlling the flow of people, usually combined wth some sort of ticket or payment validation
  • U
  • V
  • W
  • X
  • Y
  • Z