principles of ISO 27001

What are the three principles of ISO 27001?


The ISO 27001 standard was developed to guide organisations, both large and small, to better protect their information assets in a manner that is risk-based, systematic and cost-effective. ISO created this framework in partnership with the International Electrotechnical Commission (IEC). The standard works by taking inputs from management so that an accurate picture of the security risks, threats and vulnerabilities can be presented to the organisational decision-makers. Additionally, the standard provides custom-made security controls around organisation-specific issues that it identifies. This is done by the creation of an Information Security Management System (ISMS) which is essentially a collection of policies and procedures that help to systematically manage an organisation’s sensitive data. In this article we are going to talk about principles of ISO 27001; If you want to develop your organisations, don’t miss it.

Principle of least privilege ISO 27001 and its goals

The purpose of an ISMS is to minimise risks and ensure business continuity by proactively limiting the impact of potential security breaches. The reason why this standard is so performant is that it has undergone many revisions since its release in 2005. The first update was released in 2013 and the second in 2017. The 2013 version calls for an in-depth asset inventory and the 2017 update specifically lists information as an asset, which means that it also needs to be inventoried. This update showcases a changing view on information and how it is now inventoried just like physical assets. In this article, we will discuss the three principles that are the most fundamental elements of information security and should operate as the primary goals of any organisation’s security framework. Should the three principles of ISO 27001, namely confidentiality, integrity and availability be adopted appropriately, an organisation can trust that the data security best practices are operating at their full capacity.

Principle of least privilege ISO 27001

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Three principles of ISO 27001; Confidentiality of data

Having ISO 27001 certification Australia is very important for successful managers. The principle of information security focuses on keeping information private and secure as well as protected from unauthorised disclosure or misinterpretation by third parties. This means that provisions should be made to allow access to only those who are authorised to obtain the necessary data, while those who are unauthorised are met with preventive measures. This includes addressing cyber-attacks that threaten confidentiality or any attack that aims to intercept access to data. Port scanners and keyloggers are examples of attack mechanisms that aim to threaten confidentiality. 

One method to keep data confidential is to utilise encryption in data transfers. Utilising encryption ensures that only the authorised parties have access to the data being transmitted. Another strategy that enhances confidentiality is managing data access with password policies which ensures that all data is password protected. Additionally, to ensure stability, multi-factor authentication for access can be enabled. Another method to keep data confidential is to employ physical access controls by keeping drives and physical copies of data locked in storerooms or cabinets where only authorised individuals have access.

Three principles of ISO 27001

Integrity of data; Principles of ISO 27001

The principle of information security considers the completeness, consistency and accuracy of data over its life cycle. This means that it is important to ensure that data is not altered in any way, whether in transit or when it is housed in data storage. this principle in observed in ISO 9001 too. Utilising mitigation steps becomes essential to ensure that data integrity is maintained and that data tampering is prevented. When considering data integrity, it is vital to consider when the data was first received or created. Considering the data chronology and origin is essential to ensuring its validity throughout the life cycle of its use. Cyber attacks and malware are the biggest threats to data integrity. Additionally, integrity also means ensuring that the data does not get corrupted in any manner, either by attack or through human error. Damage, either to itself or any form of the data is also considered an issue of integrity. This is because any damage may impact the accuracy of data reporting which is a necessity for many business operations. 

One method to ensure data integrity is to avoid duplication of data. A data inventory can help organisations keep track of the data that they house, and its flow throughout the organisation. This helps to ensure that there is no data duplication and that the data that you have is complete and accurate. All duplicate data or backups should be stored in one location. This recommendation holds for digital as well as physical copies. Even when the digital sources of data are being removed, you need to ensure that accurate backup are available.

ISO 2700 basic principles; Availability of data

The principle of information security pertains to the assurance that all data and applicable systems remain available for uninterrupted access to the appropriate and authorised personnel. This begins by ensuring that information and services are available to the necessary user for regular business operations. One of the biggest threats to data availability is a Denial-Of-Service (DOS) which aims to shut down a machine or network, making it inaccessible to authorised users. Additionally, a reliable data system can be impacted by network failure, human error, or hardware malfunction. An excellent way to mitigate all threats is to establish a disaster recovery plan for any perceived threats to data systems before they happen. Similarly, data redundancy or keeping multiple backups of information is another smart step towards sustainability.  

3 principles of ISO 27001

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