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Within site

Information on the protective security measures that can achieve the protective security principles of Deter, Detect, Delay, Mitigate and Response within a site.


Within site covers:

  • Area within the perimeter up to the boundary of the asset or building



  • Amplify the deterrence value of security measures within a site through an effective communications campaign
  • Reduce the effectiveness of an attack by ensuring key assets or buildings are not signposted in ways that would help an adversary. Channel adversaries towards non-critical components or areas where possible where a response force can safely intervene


  • Signs within the area warning 'keep out' to prevent the triggering of security systems but not providing any details of the system(s)
  • Use of site signage (directions, health and safety warnings) to deter adversaries from approaching critical areas


  • Identify unauthorised intrusion within the site perimeter
  • Enable the tracking of an attack force within the site perimeter ensuring the situational awareness is maintained to enable the direction of the response force


  • Use of free-standing perimeter intrusion detection systems, supported by CCTV and light to detect an intruder within the site
  • Configuring the security control room and supporting technologies to maximise both the likelihood of detection and situational awareness to assist with the direction of the response


  • Implement additional security measures within the perimeter to provide confusion and obstruction to the attack force in order to slow their progress during a site incursion


  • Maximising the area between the perimeter and the asset
  • Use both natural (ditches, rises in ground level and planting) and man-made (demarcation fences, non-critical buildings and cable tidies) obstacles to slow progress


  • Maximise standoff to critical assets within the site
  • Consider the impact of an attack on structures and equipment within the site, selecting appropriate protective security measures


  • Situate car parking either outside your perimeter or at a significant distance from critical assets; where appropriate enforce using vehicle security barriers
  • Limit access to critical equipment to authorised staff


  • Determine what response is required within your site for the range of threats your site faces and ensure measures are in tied into response plans
  • Where appropriate exercise your response plans with relevant internal and external stakeholders


  • Using CCTV to track and direct the response force to an intruder on the site
  • Develop a communications plan with your response force to ensure consistency in the accuracy and clarity of information provided

The following pages provide more information on the protective security measures which can be used to achieve the protective security principles above. Considering the impact a measure has on Deter, Detect and Delay is important to ensure the measures are complementary and all three Ds have been covered.

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