What is Residual Risk defined as?

Residual risk is defined as the amount of risk that remains after security measures or countermeasures have been implemented. When organizations assess and manage risk, they oftenStart with an analysis of total risk, which includes all potential threats and vulnerabilities. Countermeasures are the security controls put in place to mitigate this risk.

Therefore, residual risk can be quantified by taking total risk and subtracting the effectiveness of the countermeasures: what is left, or remaining, after those measures are accounted for is the residual risk. This concept is critical in risk management as it helps organizations understand the extent of risk they still face once controls are in place, guiding further decisions regarding risk treatment and acceptance.

In the context of the other options, they do not accurately align with the standard definition of residual risk. Therefore, the chosen answer accurately reflects how residual risk is calculated.