I just had an opportunity to talk Industrial cybersecurity with two leaders of The Industrial Internet Consortium (IIC) (now incorporating OpenFog) who gave an overview of the new Security Maturity Model (SMM) Practitioner’s Guide. This document provides detailed actionable guidance enabling IoT stakeholders to assess and manage the security maturity of IoT systems.
Along with the publication of the SMM Practitioner’s Guide is an update to the IoT SMM: Description and Intended Use White Paper, which provides an introduction to the concepts and approach of the SMM. This white paper has been updated for consistency with the SMM Practitioner’s Guide, including revised diagrams and updated terminology.
As organizations connect their systems to the internet, they become vulnerable to new threats, and they are rightly concerned with security. Addressing these concerns requires investment, but determining investment focus and amount is a difficult business decision. The SMM helps by enabling a structured top-down approach toward setting goals as well as a means toward assessing the current security state, taking into account various specific practices. The SMM allows an organization to trade off investment against risk in a sensible manner.
Building on concepts identified in the groundbreaking IIC Industrial Internet Security Framework published in 2016, the SMM defines levels of security maturity for a company to achieve based on its security goals and objectives as well as its appetite for risk. Organizations may improve their security state by making continued security assessments and improvements over time, up to their required level.
“This is the first model of its kind to assess the maturity of organizations’ IoT systems in a way that includes governance, technology and system management,” said Stephen Mellor, CTO, IIC. “Other models address part of what is addressed by the SMM: they may address a particular industry, IoT but not security, or security but not IoT. The SMM covers all these aspects and points to parts of existing models, where appropriate, to recognize existing work and avoid duplication.”
The practitioner’s guide includes tables describing what must be done to reach a given security comprehensiveness for each security domain, subdomain and practice and can be extended to address specific industry or system scope needs. Following each table is an example using various industry use cases to demonstrate how an organization might use the table to pick a target state or to evaluate a current state.
One example is that of an automotive manufacturer considering the possible threats interfering with the operations of a vehicle key fob. The manufacturer sets its target maturity comprehensiveness level to “1” as it considers some IT threats, such as a Denial of Service attack that may prevent a driver from opening the car door using the key fob. Over time, as new threats emerge, the manufacturer realizes it needs additional threat modeling and enhanced practices so raises its target maturity comprehensiveness level to a higher level “2.”
The practitioner’s guide contains three case studies that show IoT stakeholders how to apply the process based on realistic assessments, showing how the SMM can be applied in practice. The case studies include a smarter data-driven bottling line, an automotive gateway supporting OTA updates and security cameras used in residential settings.
The IIC designed the Security Maturity Model to be extended for industry and system specific requirements. The IIC is collaborating with various industry groups to develop industry profiles that extend the model. Industry associations interested in developing profiles are encouraged to contact the IIC. Please send an email to [email protected]
For more information about the IIC SMM Practitioner’s Guide, IIC members have prepared a webinar “Get a True Sense of Security Maturity,” which will air on March 18th at 12:00 pm for 60 minutes. Use this PIN: 12374028
The full IIC Security Maturity Model Practitioner’s Guide and a list of IIC members who contributed can be found on the IIC website.