Availability

In Brief

The ‘availability’ of an asset within an entity is the assurance that it can be used in terms of time and expected performance. Security measures intended to guarantee the availability of assets must, therefore, ensure that a resource remains usable in terms of capacity and planned time. (See also classification.)

Threats Jeopardising Availability

Here is a non-exhaustive list of EBIOS threats that can jeopardise the availability of an asset:

Physical damage

Natural events

  • Climatic phenomenon
  • Seismic phenomenon
  • Volcanic phenomenon
  • Meteorological phenomenon
  • Raw

Loss of essential services

Distribution due to radiation

  • Electromagnetic radiation
  • Thermal radiation
  • Electromagnetic pulses (EMI)

Compromise of information

Technical failures

Unauthorised actions

Compromise of functions