Tailgating - Access Control Tutorial

Author: Brian Rhodes, Published on Aug 25, 2016

Despite costing thousands of dollars per door, electronic access control systems are vulnerable to an easy exploit called 'tailgating'. Unless this threat is recognized and addressed, even a friendly gesture compromises one's security investment.

In this note, we take a look at 'tailgating', the most common causes / risks, and contrast 4 options to address / minimize tailgating:

  • 'Hold Open' Alarms
  • Turnstiles/Revolving Doors
  • Mantraps/Airlocks
  • Piggybacking Detectors/Analytics

******* ******* ********* ** ******* *** ****, ********** ****** ******* systems *** ********** ** ** **** ******* ****** '**********'. ****** this ****** ** ********** *** *********, **** * ******** ******* compromises ***'* ******** **********.

** **** ****, ** **** * **** ** '**********', *** most ****** ****** / *****, *** ******** * ******* ** address / ******** **********:

  • '**** ****' ******
  • **********/********* *****
  • ********/********
  • ************ *********/*********

[***************]

The *******

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*** ********* *** ******** ***** **** ******* * **** **** for *******.  ** **** ******* ************, ********* **** ******* ** focused ** ********* ****** ** ******* ** **** ****. *****, but **** ***** ** ***, ** **** ******* ******* * malicious *** ** ********* ******** ****** * ***** **** ****** to **** *** ******** ******.

Common ******** *** ******* *****

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*** **** ****** ********** **** ** **** **** ********** ******* do *** ******** *** **** *** *********** ** ****** ******* system **** ***** *** '**** *******'. 

******, **** ******** ********** ** *** ******* * **** ***** circulate. ********* ******** ******** *** ******* ** ******** *** *******, like:

*******, *** ****** ***** ******** **** ** ********* ** **** the **** *** * **** ** ********** ** **** ** is ****** *** ******.

******** ********* ** ***

**** ****** ** *** ************ **** ** ********* ******** ******** of * **** ** ********, *** **** **** ** ********* just *** *********** ***** ** ******** ***** ******** *** **. 

*** **** ****** ** ******* '**********' **** '********' ** ****** awareness ** ***, ** **, * **** ** * ******** point. *** *** ******** *****, *** **** ***** ********** ****, are *********** **** ** *** ******** ****** ********** *********.  *** if * **** ** **** ****** *** ******, ** ** it ** ******** **** ******* ******* **** ******* ** *******, it ****** ***** ** **** **** *** ******** **** ****** after ********** *****.

*** ***** ********, **** ******** *** **** ******* ** ***** necessary ** ********* ********** ***** ** *** ******** **********. ******** people *** ******* ******* ** * '*** ****', *** ***** most ******* ********* *** ** ******* **** **** ****.

Other ************ *******

***** *** * ******* ** ***** ********** **** ******. ************* the '***' ** **** **** ********** ***** ** ********* *** best ******* ******* **:

  • Bad *******: Especially in rainy and cold climates, holding the door open offers a welcome shortcut to those seeking the warm and dry environment of a facility. In these cases, sheltered entries, **********, ** ******* **** ******** *** ******** ** **** **** doors *** ** ************* *********.
  • Misaligned/Worn *****: Over the course of thousands of open/close cycles, even commercial grade doors, hinges, frames and closers sag or become worn over time. If left unchecked, doors may not fully close when opened or may take a long time to close, therefore allowing many people entrance from a single card read. A regular and discipline door maintenance schedule for access controlled openings is critical to prevent the issue.
  • *************/********:***** *** * ******* ** ****** **** ** **** * door **** ******** ***** ** *** **** ******. *********, *****, bunched-up ****, *** ******** ********* *** *** ******** ******** ** eliminate *** **** ** ********** * ********** *** ******, ***** seen ** ******* ** *********. *** **** ******, ******** ************ 'smoking ****' ***** ** ******** ********* **** ******* *** ******** systems ** ******** ********* *** ******* ***** ************** ***** *** outside ******.
  • Malicious ******: Preventing untrusted or dangerous people from entering an area is often the primary goal of access control. Often, readers and locks alone are not enough to mitigate this risk despite the occurence being minor. To properly prevent undetected entry, often additional engineering controls like sensors, analytics, or even turnstiles are needed.

The ********

*** **** ** ********** ** ********** *** ****** ***** ****** controlled ******** ** **********. ***********, * **** ** *********** ******** are ********* ** ****** *** *******. ** *** ******* ***** we **** * **** ** *** ***** *****:

  • '**** ****' ******
  • **********/********* *****
  • ********/********
  • ************ *********/*********

'**** ****' ****** 

**** ****** ******* ******* **** *** ******* ** ******* **** contacts - ****** ******** **** ***** ******* * **** ** closed ** *** - *** *** ** *** ** ***** if * **** ** **** **** *** *** ****.  ******** occurs ** ***** **** ****** **** * *** *******, ******* indicating **** ******** ****** *** ******* ******* * '**** ****' door. *******, ***** **** ** * ***-**** ** **** ******* for ********** **********, ** **** ** *** ******* ****** ** nuisance ******** **** ***********. ****** * ******** ******** ******** *** access ******* ******, **** ******** ** ****** ** ** (********) dismissed ** ********** *** ***********.

********** ****** ****** ******* **** ******* $*** - $*,*** ******* many ****** ******* ******* *** ** ********** ** ***** * local ***** *** ****** ****** *** **** ******** ******** ** a '****' ************* *******.

**********/********* *****

** ****** *****, ********** **** ***** **** *******, ***** ********** devices ** *******, *****, *************** ****** ****** ******* ******. **** type ** ********* ********* ***** ** * ****** ****** ** a ****, *** ********** *** ******* ** **** * **** open *** ************ ******.

*** *********** ***** ***** ******** ** ******* ** ** '****** turnstile' ******** ** ******** ****** **** ** ******** *****, *** features '**********' *********:

** ******* **** ********** **** ** *** **** **** ********* (*****) ****.

*** **** ** ********** *** ********* ***** *** ***** **** $1,000 ** $**,***+ *** *** ********** **** ****** ********, *** retrofitted *************. *** ****, *** *** ********** *****.

********/ ********

***** ************* *** ********* **** ******* *** **** ** ********** doors. ******* ***** **** ***** ****** *** *** ********, *** doors *** ********** ** **** *** *** ** * ****. This ***** *** ******** *** ****** ** ****** ***** *** exterior *** *** **** ****** *** ** ******. ******* *** physical ***** ****** * ******* ** *****, **** *** ****** per **** **** ** ********* ******* *** *****. ******** *** be ********** *** ********** ******, ** ***** ** *** ******* below, ***** ** ********** **** ** ******** **** **** * wheelchair-credentialed **** ***** ** ** * ****:

***** ************* **** * ******* ** ********* **** ****** ********; in **** ***** *** ******** ** ******** ** ********* '***** room' ************ **** ******* *************, ** **** *** **** ** inspection *********** *** **********. ***** ************* *** ***********, *** ******* they *** ******** **** ** ***** *** **** ***** ******** footprints, **** *** ***** *** **** ****** ****-********** ********.

*** **** ** ******** *** ******** *** ********* **** *********, routinely ******* **** **** $**,*** ** *********. **** ********** *** revolving *****, ***** ******** ********** *** **** ****** ********, *** retrofitted *************. *** ****, ***** *** ******** ******** ****.

************ *********/*********:

**** ******, ******* ***** ** ******* **** ** *** ***** of * ****, ** ****** ********-****** ************ *******, *** ********** to ****** ********** ******** ******* ** *******. *** ******** ******* of * ****** ********** ** ******** ******* *** ****** ******** measured ** ** *********** **** ** *******. ***** ** ******** anomalies (**: *** ******* ** ******** ** '******'), *** **** or ****** **** *****. ********* *** **** ****** ** ***** to ***** ** *****,

*** ******* ** *** ****-***** ********* ******** **** ** *** promo ***** *****:

*** **** ** ***** ********* ****, *** ********* ***** **** $300+ *** * ****** ******** (**** ******), ** a ****** '***** *******' ******.

Solving *** *******

***** ********* ******, *** '****' ****** ** ** ***** ****** to ******.

**** ******** ******** ***** **** ********** ****** **** ** ******** instructions *** ******* ** ****** ********** ******* ***** *** *****. Lacking *** ******* ** ************** **** ** ********* *** *****, the ************* (*** ********** *****) ** ********** ******.

 

** ***** ***** ***** ********** **** ** *********, *** *** of ********** *** ******* ** ******. *******, *** ** *** cost ** ***** *********, **** *** ***** **** **** *** expensive *** ******* *** *** **** ****** (*** ****-*********) ******* like ********* ********* ** ***** *********.

Comments (2)

** **** ** **** ** ******, **** ***** ** ** active *****. ** **** ********* *** *** *** ******* *** explained, *** * *** ****.

* ******** * ****** *** * ***** **** ********* ****/******** elements. ******** *** ******* ***** ** *** ***. **** **** had ****** ***** ** *** ***. ** *** * **** study ** **** *** ******* ** * *********/*********/** ********** ******. Due ** ** ***** **** *********** ****/*** * ****** ****** in *** ***** *****, *** ****** ***** **** ****** ******* lines, **** ****** ***** ***** *** **** ****** ****** ** watch ******. **** **** ****** ****** * ******** *** *** together ******* ** **** *****.

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+

* **** ****** ** **** ********

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