October 8, 2024
What are the main principles of ISO 27001?
Implementing ISO standards is a fantastic way to streamline processes and showcase expertise. As digital technology advances, ISO 27001 should be central to your plans.
ISO 27001 is the international information security management system (ISMS) standard. Following its framework and guidance means you’ll be better positioned to protect your organisation against cyber threats, disasters and mistakes, ensuring your data and systems remain available, secure and accurate.
But how do you adhere to ISO 27001 standards? This blog looks at the main principles and gives you everything you need to know.
Core principles of ISO 27001
There are many aspects to ISO 27001 certification. First and foremost, it isn’t just about IT and cybersecurity, although there is a lot of crossover as we live in a technology-driven world.  Information security aims to protect all information, including digital information such as online data and files, hard-copy information like printed documents and records, and unwritten information or knowledge within the organisation.
There’s also a common misconception that ISO 27001 is ‘just for your IT team to deal with’, whereas on reality, your entire organisation deals with information that needs to be kept secure. ISO 27001 sets the framework for doing so. Some of its core principles include:
#1 Risk assessment and treatment
Start your ISO 27001 compliance plan with a risk assessment, identifying potential vulnerabilities in your system. These could include unprotected access points, weak firewalls or . Next, assess the likelihood of these risks and establish what might happen if something does go wrong.
With all this in mind, you have everything you need to decide on the suitable measures for mitigating these risks. Develop a strategy and an implementation plan to keep your  information safe.
Taking this structured approach ensures your security controls pivot around the most vulnerable areas of your systems, making them far more effective than generic solutions.
#2 Security policy
Next up, your security policy. Your security policy should be a fundamental document your organisation uses to define its approach to information security. Employees, departments and trusted external consultants use it to understand what needs protecting and the practical strategies you take to meet compliance regulations.
ISO 27001 requires you to develop and maintain a comprehensive security policy. If it sounds like a bit much, don’t worry. Although the finished product should be a detailed document, take it one step at a time. It will take a few weeks, but you’ll end up with a document that forms the backbone of your information security strategy.
#3 Organisation of information security
ISO 27001 stresses the importance of clearly defined roles and responsibilities in organisational information security. Combined with a well-organised structure (in terms of software and hardware), this creates the most effective information security possible, as it allows you to segregate risks, threats and vulnerabilities.
So, to comply with ISO 27001, appoint someone (or a team) to manage and enforce your security policy (see above). Of course, this must be an individual or group that you trust, since they’ll have almost complete access to your network. Once you’re happy, give them the authority and resources they need to do their job.
#4 Asset management
Your information assets are critical components. Protecting them is essential.
ISO 27001 enforces identifying and classifying these assets based on their value and sensitivity. You can then use this information to focus your protection measures on the assets that require the most stringent defences.
To comply with ISO 27001, keep an up-to-date inventory of these assets and put controls in place to protect them throughout their useful lifecycle.
#5 Physical and technological controls
No information security strategy is complete without robust physical and technological safeguards. ISO 27001 recognises this crucial aspect, emphasising the need for comprehensive protection of your assets, both tangible and digital.
On the physical side, this involves securing your premises against unauthorised access. It’s about creating a controlled environment where sensitive information remains safe from prying eyes and sticky fingers. Think secure doors, CCTV systems and strict visitor management protocols.
You’ll need to implement a range of controls to protect your digital assets, including firewalls, intrusion detection systems and encryption protocols. Don’t forget about access controls—ensure your staff have access only to the information they need to do their jobs.
These controls shouldn’t be static. They need regular testing and updating to stay ahead of evolving threats. Combining robust physical security with cutting-edge technology solutions helps create a formidable defence for your organisation’s information.
#6 Human resources security
The final key principle of ISO 27001 is your human resources security. All organisations need people, and your people use your IT systems. Your cyber defences can only be as good as those using them, so ISO 270001 covers the need for security measures related to your staff and contractors.
These personnel security measures include background checks, security training and setting clear procedures to prepare for work handovers. These help you build a security-conscious culture, one of the most important aspects of keeping your IT infrastructure secure.
Other things to know about obtaining ISO 27001
ISO 27001 will only be obtainable if your business’s leadership team is entirely on board. At the top (board and operations) levels, management must actively support the ISMS, encouraging employees and contractors beneath them to embrace the changes. Their enthusiasm will trickle down and spread throughout your organisation, eventually incorporating the ISMS into your business’s processes and culture. However, without a commitment from your leaders and management, employees will have no reason to follow the ISMS and nothing to hold them accountable.
Your information resources continually change and evolve. So, you should also adapt your ISMS to keep pace. The PDCA cycle, explained (in brief) below, is critical to this:
- Plan – Develop a strategy for your ISMS, identifying risks and opportunities.
- Do – Implement the ISMS controls and processes.
- Check – Use KPIs to monitor and measure how well your ISMS meets your objectives.
- Act – Adjust your ISMS in areas that require improvement.
Use the PDCA cycle to ensure your ISMS remains effective, no matter the changes in business environments.
Building a strong ISMS with ISO Quality Services Ltd
ISO 27001 can help your business develop a resilient IT system and maintain data security.
Focusing on the core principles mentioned in this article will help you build a strong, effective ISMS compliant with ISO 27001.
If you’re wary of doing this on your own, don’t worry.
ISO QSL can help you to help you analyse your current setup, understand areas that need improvement and implement a more effective ISMS. We can help your business prepare for – and pass – the ISO 27001 certification process and create a more efficient, cost-effective information security posture, all in as little as eight weeks.
Interested in learning more? Contact us today for a free, friendly chat about what we can do for you.
