How to Build a Cybersecurity Metric Data Dictionary That Executives Can Actually Trust

Creating a Trustworthy Cybersecurity Metric Data Dictionary for Executive Use

Aim: The goal is to develop a data dictionary that ensures every cybersecurity dashboard number is reproducible and trustworthy for executives. The issue is that multiple people may not be able to reproduce the same number from the same evidence due to undefined metric contracts.

NIST Guidance: The National Institute of Standards and Technology (NIST) provides a measurement program framework for collecting, analyzing, and communicating data used to monitor information security risk. NIST recommends documenting scope, numeric measure, formula, target, implementation evidence, responsible parties, data source, time reference, and reporting format.

The Problem: A common issue with dashboards is that they may appear precise but hide a basic operational problem. The problem lies in undefined metric contracts, which include scope, formula, denominator, source, timestamp, owner, validation, and exception handling.

A Solution: A practical data dictionary should turn those ideas into one reviewable record per metric. It should include boundary information, such as being an operational design guide and not legal advice, audit opinion, certification, or evidence of control effectiveness.

Key Points:

- Define a stable metric ID and capture necessary fields before a metric enters a recurring report

- Include fields like Metric ID, decision question, scope, grain, numerator, denominator, formula, target, source system, as-of rule, freshness SLA, validation schema, and exception policy

- Ensure clear definition of terms like metric ID, decision question, scope, grain, numerator, denominator, formula, target, source system, as-of rule, freshness SLA, validation schema, and exception policy

- Follow a four-step quality gate process before publishing the metric, which includes definition gate, data gate, reproduction gate, and communication gate

Implementation: To build a trustworthy cybersecurity metric data dictionary, security program managers, GRC leads, control owners, audit coordinators, and consultants should work together to implement these guidelines. By following this data dictionary, executives can trust the numbers presented on cybersecurity dashboards and make informed decisions based on accurate and reliable data.