Zero Trust: Why is this becoming critical against new cyber threats?

As cyber attacks continue to evolve, traditional security models are showing their limits. Today, 81% of organisations are turning to Zero Trust as the foundation of their cyber security strategies. This approach, which challenges the notion of implicit trust, is emerging as an essential strategic solution for effectively protecting digital assets. This article looks at how Zero Trust has established itself as a method of cyber security, and how it offers effective protection.

1. Why are traditional security models no longer sufficient?

Traditional security models are often based on the notion of “implicit trust” within the corporate network. This approach creates a security perimeter around the network, assuming that everything inside is safe. However, this approach has significant limitations against modern threats.

Increases in attacks, such as ransomware, insider threats and supply chain attacks, expose the vulnerabilities of this approach. Attackers are increasingly exploiting vulnerabilities in systems, applications and configurations, putting organisations' sensitive data at risk. In the second half of 2024, the total number of email attacks detected increased by 197% compared with the second half of 2023. In addition, employees, partners and other stakeholders often need to access company resources from outside the network, making the traditional security perimeter an intrusion vector.

These new threats require a paradigm shift. Traditional models can no longer ensure effective protection, and this is where Zero Trust comes into play.

2. Zero Trust: A response tailored to modern threats

Zero Trust is based on a simple but fundamental principle: “Never trust, always check”. This approach requires continuous and rigorous monitoring of every user, device and application accessing the organisation's resources. Rather than trusting everything inside the network by default, Zero Trust treats every access request as potentially malicious and requires explicit authentication and authorisation before granting access.

The fundamental principles of Zero Trust include verifying every identity, verifying endpoint integrity, applying the least privilege, micro-segmenting the network and continuous monitoring of activity. These principles limit the attack surface, reduce the risk of propagating intrusions, and detect suspicious activities faster.

These principles are reflected in the five technical pillars that make up the Zero Trust architecture:

• Users: Identity security using Multi-Factor Authentication (MFA) or Public Key Infrastructure (PKI).
• Devices: Endpoint security, eXtended Detection and Response (XDR) and antivirus.
• Applications and Workloads: Application security by controlling access, transactions and user behaviour.
• Network: Network security, Zero Trust Network Access (ZTNA), Virtual Private Network (VPN), softless encryption or Network Detection and Response (NDR).
• Data: Data security through signature and end-to-end encryption.

Adopting a Zero Trust approach requires an in-depth transformation of security practices. But how can this approach be implemented in practice within an organisation, and what solutions are available to achieve this?

3. How can you adopt a Zero Trust approach with the right business solutions?

Adopting a Zero Trust approach is a gradual transition that needs to be adapted to the specific needs of each organisation. It is essential to start by assessing the risks and identifying the critical assets to be protected. Then, this requires security solutions that enable the Zero Trust principles to be implemented, by adopting a multi-layer approach and integrating incident detection and response tools.

It is important to note that implementing Zero Trust can also present challenges, such as the complexity of implementation, user resistance to change and the need for rigorous exception management. Careful planning and a gradual approach are therefore essential for this transition to be a success.

There are several possible ways of integrating Zero Trust principles into a “traditional” IT system:

• Improved identity governance: Verify the identity of each user and device, and take into account information such as the time and place of connection.
• Granular and dynamic partitioning of resources: Organising information into small logical groups, according to importance and use. This allows better access control.
• State-of-the-art authentication: Using two-factor authentication methods to better protect user accounts.
• Strengthening detection resources: Collecting and analysing security information to detect suspicious activities quickly.
• Configuring security resources and services: Checking that systems and software are correctly configured to avoid security breaches.
• Change management: Informing users about new methods of access, authentication and alerts, while being vigilant with the use of digital resources.

Several solutions on the market use these Zero Trust principles. These include Cryptobox to share data confidentially, by giving each user control over their information. Each user decides with whom they share their data, whether internally or with partners, and can define access levels for each workspace. Administrators have no access to the data, which reinforces security.

With end-to-end encryption, data is protected directly on the user's device and keys never transit through the Cloud. Users can rely on the security of their own device and the trust placed in guests, in accordance with Zero Trust principles.

Conclusion

Zero Trust offers advanced protection against cyberattacks. By adopting this approach, organisations can strengthen their security, improve their resilience, protect their sensitive data and ensure business continuity. Zero Trust is not a single solution, but rather a set of principles and practices that need to be adapted to the specific needs of each organisation. To find out more and discover best practices, read the Hexatrust white paper.