CISOs have finite resources to solve near-infinite problems, requiring them to make tough choices that prioritize some security initiatives over others. The best way to make budgeting decisions and choose between competing priorities as a security leader is to focus on cyber-risk reduction.
Effective risk-based decision-making in cybersecurity often depends on the ability to quantify the risks in question. It requires some idea of the following:
- How much overall risk is reduced by spending on one project versus another.
- Which project or strategy reduces risk the furthest or fastest, if prioritized.
Quantifying cyber-risk, however, is not always easy or straightforward. The most rudimentary cyber-risk quantification approaches can result in shallow or misleading results, while more complex DIY methodologies may prove prohibitively cumbersome and time-consuming. Cyber-risk quantification tools can support security teams in making more sophisticated, informed and reliable decisions.
Cyber-risk quantification challenges
On the surface, quantifying risk looks easy: The following is the accepted formula:
Risk = Cost of event * Probability of event