Blog  ISO 27001 vs NIST Cybersecurity Framework

ISO 27001 vs NIST Cybersecurity Framework

| Blog, Compliance, ISO 27001

NIST vs ISO 27001

There are hundreds of complicated laws and rules worldwide that businesses are forced to follow to keep their data secure. NIST CSF and ISO 27001 are two of the most prevalent in North America. While both frameworks intend to safeguard data and strengthen security, they do so differently. Let’s look at the similarities and differences between them.


The National Institute of Standards and Technology (NIST) publishes standards, guidelines, and special publications related to the engineering of various technologies. CSF is an example of one such document. Published in 2014, it provides a set of controls to assess their security strengths and weaknesses. This standard also includes ways for organizations to improve their security.

What Is ISO 27001?

ISO is an abbreviation for the International Organization for Standardization. This organization publishes a set of standards that organizations worldwide can use to improve their information security systems. ISO 27001 is one such standard, published in 2013. It has over 250 pages and over 200 clauses that organizations can improve their security.

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NIST CSF and ISO 27001 are frameworks that help businesses, large or small, develop stronger information security systems. Both of these standards include controls that companies can implement to protect data. Organizations should carefully examine the standard they choose to ensure it aligns with their unique needs and company culture. 

It is also important for organizations to understand why their information security systems are lacking before implementing a standard. If implemented without considering organizational needs, NIST CSF or ISO 27001 can make companies less secure.

The Five Functions of NIST

According to NIST, it covers the following functions: 


Develop an understanding of how to manage cybersecurity risks to systems, people, assets, data, and capabilities in your company’s context. Understanding the business environment, essential resources, and associated cybersecurity threats allows an organization to concentrate and prioritize its efforts according to its risk management approach and industry needs.


Create security protocols and safeguards that protect your systems from the most threats while minimizing the negative consequences of the rest. Tools, staff training, data security systems, automated monitoring capabilities, and access control features are all examples of mechanisms that may be implemented to safeguard your systems against most hazards and minimize their negative effects.


The first step in detecting a cyber attack is determining what activities should be done if one occurs. The Detect Function aids in the detection of cybersecurity events.


The Respond Function is one of the functions that may be used during a cybersecurity incident. It helps with containing the consequences of a possible cybersecurity event.


The Recover Function determines which activities should be carried out to preserve resilience and restore any capabilities or services that have been lost as a result of a cybersecurity event. It allows for timely recovery to normal operations, minimizing the harm caused by a cybersecurity incident.

NIST CSF and ISO 27001 Similarities

NIST CSF and ISO 27001 and complementary frameworks, and both require senior management support, a continual improvement process, and a risk-based approach. 

The risk management framework for both NIST and ISO are alike as well. The three steps for risk management are:

  1. Identify risks to the organization’s information 
  2. Implement controls appropriate to the risk
  3. Monitor their performance

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NIST CSF and ISO 27001 Overlap

Most people don’t realize that most security frameworks have many controls in common. As a result, organizations waste time and money on compliance procedures that are not required. You’ve completed 50% of the NIST CSF when you’ve finished your ISO 27001! What’s even better is that if you implemented NIST CSFs, you’re already 80% of the way to achieving ISO 27001.

The 2010 IAS-HIM Standard also advises organizations to have a centralized tracking of physical assets and their location and identify suppliers that can be held responsible for the maintenance or replacement of those assets. That is in line with Annex A.8.1 of ISO27001 for asset responsibility and ID.AM from NIST CSF.

NIST CSF and ISO 27001 Differences

There are some notable variations between NIST CSF and ISO 27001. NIST was created to help US federal agencies and organizations better manage their risk. At the same time, ISO 27001 is an internationally recognized approach for establishing and maintaining an ISMS. ISO 27001 involves auditors and certifying bodies, while NIST CSF is voluntary. That’s right. NIST is a self-certification mechanism but is widely recognized.

NIST frameworks have various control catalogs and five functions to customize cybersecurity controls. At the same time, ISO 27001 Annex A provides 14 control categories with 114 controls and has ten management clauses to guide organizations through their ISMS. 

ISO 27001 is less technical, emphasizing risk-based management that provides best practice recommendations to secure all information.

The ISO 27001 offers a good certification choice for operational maturity organizations. At the same time, the NIST CSF may be best suited for organizations in the initial stages of developing a cybersecurity risk program or attempting to mitigate breaches.

The Costs of NIST CSF and ISO 27001

NIST CSF is available free of charge as it’s voluntary. Implementation can be done at your own pace and cost. However, because ISO 27001 involves audits and certification, there’s often a higher expense. ISO certification is valid for three years, and companies are required to do surveillance audits for two years, and in year three, they’ll complete a recertification audit. 

So startups will usually kick start their InfoSec program with NIST and work their way up to ISO 27001 as they scale.

NIST CSF and ISO 27001 Can Work Together

Both frameworks tackle information security and risk management from different perspectives, with varying scopes. Consider the inherent risks of your information systems, available resources, and whether or not you have an existing InfoSec plan before deciding whether to create and use a more well-known framework like ISO 27001 on your own.

ISO 27001, NIST CSF and TrustNet

The close resemblance between NIST and ISO 27001 makes them simple to combine for a more secure security posture. Our ISO 27001 framework, which includes all 138 Annex A controls and the statement of applicability (SoA), can help you choose which controls are essential and provide reasoning. It also contains extra elements relevant to ISO 27001.

With the use of NIST CSF on the rise, more small and medium businesses will likely inquire about compliance. We’ve made that easy in TrustNet.

So it’s not a choice between ISO 27001 and NIST CSF. It’s more a question of how your organization will use the certifications. 

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