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A zero-trust security strategy is a model of reinforced cybersecurity to combat all internal and external threats. Read on to learn more about this model.

Summary

In a digital world where security threats loom ever larger, companies have to transform themselves on an ongoing basis to protect their data and systems against malicious attacks. Traditional perimeter security strategies involving firewalls and flow control are no longer enough to do this. Among the new strategies that are emerging, ‘Zero Trust’ has become a fundamental principle for guaranteeing network and data security.

So what does it actually involve?

A Zero Trust strategy is a security approach that challenges the principle of ‘implicit trust’ in computer networks. Unlike traditional methods whereby a user can be granted extensive access once they have been authenticated, a Zero Trust approach works on the assumption that all activities and access requests must be checked and authorized on an ongoing basis in accordance with multiple criteria. This means that every user, device or process must be authenticated and authorized before they are able to access a resource, irrespective of their role in the network. This approach also uses the ‘Principle of Least Privilege’ (PoLP). With this users are only granted the minimum number of permissions they need to perform their tasks, thereby reducing the potential attack surface.

How does it work?

Zero Trust works by using a number of different technical approaches, such as multi-factor authentication (MFA), network micro-segmentation and real-time activity monitoring. For example, when a user attempts to access an application, their identity will be verified using an MFA process. The network security policy is then applied to determine whether and to what extent the user is authorized to access this application.

What are the fundamental principles of the zero trust strategy?

Ongoing verification of identity

Rather than relying on static identifiers such as passwords, the Zero Trust strategy advocates the continuous verification of user and device identities. This ensures that only people authorized to access resources can do so, even after initial authentication.

Micro-segmentation of the network

Rather than creating a single security perimeter, by segmenting the network into smaller zones it is possible to help limit the spread of attacks. Each segment is independently secured and controlled, thereby reducing overall risk.

Principle of least privilege

Users and devices only have access to the resources they need to perform their tasks. By limiting access privileges, the attack surface is reduced and the potential impact of any violations is thus mitigated.

Continuous monitoring

Real-time monitoring of network activity allows suspicious behaviour and intrusion attempts to be detected. Faults are identified and dealt with quickly to limit potential damage.

What are the advantages of a Zero Trust architecture?

Adopting a Zero Trust architecture provides several significant advantages to businesses.

Reduced attack surface

By limiting access to resources, Zero Trust reduces the potential attack surface for cybercriminals.

Protection of sensitive data

By verifying users’ identities on a continuous basis and applying strict security policies, Zero Trust ensures that only authorized persons can access sensitive data.

Proactive detection of threats

The continuous monitoring of network activity enables suspicious behaviour and intrusion attempts to be detected at an early stage, enabling in turn a proactive response to threats.

Greater resilience to cyber attacks

By adopting an approach that focuses on verification and continuous monitoring, companies are able to protect themselves more effectively against cyber attacks and to minimise potential damage in the event of a breach.

With greater numbers of people working remotely and a larger number of devices being connected to the corporate network, Zero Trust is becoming evermore relevant for guaranteeing robust security, irrespective of the device being used to access resources. Furthermore, by investing in a Zero Trust approach, companies can also improve their compliance levels with data protection and privacy regulations, which can subsequently result in significant benefits in terms of reputation and customer trust.

How to implement a Zero Trust model

Implementing a Zero Trust strategy requires commitment at both an organizational and technological level. Here are a few key steps:

  • Critical assessment of assets: identify the organisation’s most sensitive data and resources to determine what security measures are required.
  • Network mapping: understand network topology and data flows in order to implement effective segmentation.
  • Deployment of security solutions: in order to enhance security, integrate advanced security tools such as next-generation firewalls, identity and access management (IAM) solutions, and threat detection systems.
  • Training and awareness: ensure employees are aware of the principles of the Zero Trust strategy and provide them with training in IT security best practices.
  • Ongoing assessment: regularly reassess the security position of the organisation and adjust measures to meet changing threats and needs.

A Zero Trust strategy also offers the flexibility to adapt to changes in technology and specific business needs. For example, it can be implemented gradually, in stages, thereby allowing the organisation to manage change more smoothly, without causing any disruption to operations.

How much does it cost to implement a Zero Trust strategy?

The cost of implementing a Zero Trust strategy can vary according to the size and complexity of the organisation and the security solutions that the organisation chooses to implement. However, investing in security is generally regarded as essential in order to protect business activities and data.

Qim info: your trusted partner for implementing a Zero Trust strategy

Qim info offers in-depth expertise in IT security and can help you to design, implement and manage a Zero Trust strategy tailored to meet your specific needs. Discover our Centre of Expertise. With our customer-centric approach and commitment to excellence, we’re the ideal partner if you’re looking to strengthen your company’s security in an ever-changing digital world.

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