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Feb 6, 2014

SMotW #91: incident management maturity

Security Metric of the Week #91: information security incident management maturity

Notwithstanding the photo, we're using 'maturity' here in the sense of wisdom, stability and advanced development, rather than sheer age! The idea behind maturity metrics is to assess the organization against the current state of the art, also known as good practice or best practice.

This particular metric measures the organization's processes for managing (identifying, reporting, assessing, responding to, resolving and learning from) information security incidents. 

That's all very well in theory, but how do we actually identify good/best practices, and then how do we measure against them?

The maturity metrics described in PRAGMATIC Security Metrics employ a method that I developed and used very successfully over 3 decades in information security and IT audit roles. The scoring process breaks down the area under review into a series of activities and offers guidance notes or criteria for bad, mediocre, good and best practices in each of those activities, based on an appreciation of the related risks and control practices gained from experience and research. The scoring tables contain a distillation of knowledge in a form that gives reasonably objective guidance for the assessment, without being overly restrictive. The approach is flexible since the table is readily updated as new practices and issues emerge (including good and not so good practices discovered in the course of my audits, assessments and consultancy work across hundreds of organizations and business units, plus advice gleaned from standards, advisories, textbooks, vendors, blogs and so forth), either by amending the wording of the existing rows in the scoring table or by adding new rows. Furthermore, the assessor has some latitude at run-time (during the assessment) to read between the lines, applying his/her expertise and knowledge in determining how well the organization is really doing against each of the criteria. The metric deliberately and consciously blends objectivity with subjectivity through a measurement process that turns out to be surprisingly useful, informative and repeatable in practice.

The maturity metrics scoring tables given in the book are illustrations or examples to demonstrate the approach and get you started, but it's up to you to take them forward, adapting and developing them henceforth. The scoring tables, and hence the metrics, are themselves intended to continue evolving and maturing over time. 

ACME gave this metric an overall PRAGMATIC score of 86%, putting it firmly in contention as our "security metric of the quarter" ...

The next post on the Security Metametrics blog will list the quarter's metrics in order of their PRAGMATIC scores