Zero Trust security is a cybersecurity model. It relies on the principle that no entity - be it a user or device - should be trusted inherently. Hence, the name 'Zero Trust'. The Zero Trust architecture follows the least privilege policy and involves stringent authorisation and identity validation for every access request. According to a leading research and advisory company, around 60% of organisations across the world will follow zero-trust security principles by 2025.
Shift from Traditional Security Models to Zero Trust Model
The traditional security architecture is also known as the 'castle-and-moat' design. Here, the network is the 'castle' and the users with permission to enter 'cross the moat' to access the network perimeter.
Although this practice helped protect the network against external dangers, it could not restrain the threats that were already inside. In simple words, this perimeter-based security strategy only doubts the external elements. However, once those are in (cross the moat), they are free to rule and disrupt your system (castle).
On the contrary, a Zero Trust security framework trusts no one. It is based on strict identity verification rather than trusting users or devices, regardless of whether they are inside or outside the network.
The shift from traditional security models to Zero Trust security models is the need of the hour due to the following reasons -
With the refinement of cyberattacks, traditional models often appear weak in guarding networks against the different types of threats.
Conventional frameworks are likely to be prone to insider threats and data breaches.
Due to the rise of cloud-based and remote work, the castle and moat designs have become less effective.
Zero Trust security principles depend on persistent authentication. This ensures that access is given only to verified devices or users, even if they are network insiders.
Zero Trust policies, such as least privilege and micro-segmentation, also limit the odds of a security breach.
Principles of Zero Trust Model
The following are the Zero Trust security principles every network should follow to keep cyber threats at bay:
Verify Every Access Request: This principle works on the 'Never Trust, Always Verify' policy. It means that an access request from every user or device, irrespective of its location, must be reviewed and authorised before being allowed into the network resources. It involves strong authentication practices, such as biometrics, multi-factor authentication (MFA), and certificates.
Least Privilege Access: It relies on the 'Bare Minimum' concept, where devices or users are granted only the minimum access to the resources they need to perform their jobs. It includes practices like role-based access control (RBAC) and just-in-time (JIT) access.
Microsegmentation: This security approach involves dividing a company's network into small, isolated segments to prevent hackers from laterally moving within the system.
Continuous Monitoring: Security systems should be monitoring for suspicious activities and any abnormalities. It may also involve advanced technologies, such as AI and machine learning. Continuous tracking facilitates early detection and rapid response to potential hazards.
Assume Breach: The Zero Trust model assumes that breaches are unavoidable and can happen at any point in time. So, organisations should be ready to find and take action promptly. Assuming a breach helps reduce the blast radius by limiting movement in a network.
How Zero Trust Works?
Zero Trust security policy means absolutely 'Zero Trust' on any device or individual that tries to access the company network - whether or not that entity is already inside the network periphery. Its implementation involves several factors, including the following:
Identity verification through multi-factor authentication (MFA): The meaning of multi-factor authentication (MFA) is as simple as its name. This practice verifies the identity of an individual or device using multiple credentials before providing them with access to the network. With conventional entry modes, a hacker needs to deduce the user ID and password to gain access. However, with MFA, users must provide a combination of multiple credentials. Some common MFA-oriented Zero Trust security examples include passwords, fingerprints, and OTPs. This strict authentication process makes it difficult for attackers to gain access to a network.
Device and network health checks before granting access: The Zero Trust framework checks and verifies that devices or individuals trying to access resources are safe and compliant with organizational guidelines. It also evaluates the network's health and security standing to ensure they are reliable and access can be given.
Context-based access control (location, time, device): This approach helps adeptly manage access by dynamically granting or restricting permissions depending on factors like the following:
Geolocation: It blocks access from unknown locations.
Time of access: It restricts access after business hours.
Device Trust: It denies access from individual users or personal devices.
Moreover, it supports least-privilege access to ensure only reliable entities can access the resources.
Real-time monitoring and threat detection: Zero Trust framework relies on continuous network and user activity monitoring for any suspicious pattern or behaviour. It uses real-time threat detection methods powered by AI and machine learning to figure out anomalies and enforce security policies.
Benefits of Adopting a Zero Trust Model
Let's take a quick look at the below pointers to understand the benefits of implementing the Zero Trust model:
Stronger Protection Against Insider Threats and External Attacks: It minimises the risk of insider as well as external threats by implementing stringent access controls, including continuous authentication and authorization for individuals, applications, and devices.
Improved Data Security and Reduced Attack Surface: Using micro-segmentation and least-privilege access practices reduces the extent of exploitable areas for hackers. Moreover, when access is granted only to the required person/device for the necessary tasks they need to perform, lateral movements of cyberattackers happen to decrease.
Enhanced Compliance with Industry Regulations: Zero Trust also helps with compliance with regulations like GDPR (General Data Protection Regulation). This proactive move reduces the chances of data breach risks and non-compliance fines.
Faster Threat Detection and Incident Response: Continuous monitoring and real-time threat intelligence can help with the early detection of suspicious activities. Early detection means quick and automated responses while ensuring adaptive access controls.
Role of Cyber Insurance in Zero Trust Security
A Zero Trust security framework focuses on reducing potential cybersecurity threats via strict access management and continuous user verification. However, a dedicated cyber insurance plan helps deal with the financial outcomes of data breaches that may still happen despite taking all the precautions. Here are some of the major roles that cyber insurance plays in Zero Trust policy:
Provides financial protection against data breaches and cyberattacks: Cyber insurance offers financial aid to organisations after a cyber incident, such as system compromises, phishing attacks, ransomware attacks, and data infringements. While Zero Trust security minimises the attack surface, cyber insurance ensures your business has the financial support to respond swiftly to a cyberattack.
Covers legal fees, recovery costs, and business interruption losses: An event of cyberattack can lead to significant financial burdens, including legal penalties, regulatory fines, forensic investigations, data recovery, and system restoration. Moreover, system downtime can disrupt operations, causing revenue loss. Having a cyber insurance plan in place will help you cover these expenses and recover quickly.
Complements Zero Trust by managing financial risk in case of a breach: Although a Zero-Trust policy is a stringent approach to restrict entry to network access, it may not be foolproof sometimes. Here, cyber insurance complements Zero Trust by reducing the financial risks associated with the possible breaches.
Challenges in Implementing Zero Trust Security
Zero Trust implementation comes with its share of challenges, including the following:
Complex Integration with Existing Infrastructure:
Integrating Zero Trust with traditional (legacy) systems can be a tough feat as the latter may not be able to run with the latest security protocols.
Introducing a Zero-Trust framework into the complex hybrid network (cloud or on-premises) of an organisation requires careful planning and coordination for seamless interoperability.
Moreover, the existing security systems may not be compatible with the Zero-Trust tools and assets. It may require significant upgrades and adjustments.
User Resistance to Stricter Access Controls:
If an organisation fails to implement Zero Trust systems thoughtfully, the users may get frustrated owing to the strict access controls.
They may also resist changes to their workflows. This may hamper the overall productivity of the company.
High Initial Implementation and Maintenance Costs:
Implementing Zero Trust can be a resource-intensive task that requires significant financial investment, time, and skilled professionals.
Also, companies need to provide for ongoing administration and maintenance to ensure that security policies are being followed.
Best Practices for a Successful Zero Trust Strategy
Here are the best practices to follow for a successful Zero Trust implementation:
Start with critical assets and expand gradually: Make sure to identify and protect the most valuable data, applications, and systems in the first place, then extend Zero Trust security principles across the organisation. In short, start with your data center and then move to the remote spots.
Educate employees on Zero Trust principles: Train your workforce on security best practices, phishing awareness, and the importance of verifying access requests to minimise insider threats.
Regularly review and update access controls: Continuously assess and streamline user permissions with the help of least privilege access and adaptive authentication tools.
Integrate Zero Trust with other security frameworks: Align Zero Trust with existing cybersecurity models (NIST, CIS, or ISO 27001) to strengthen overall security standing and compliance.
Conclusion
Considering the fast-evolving digital front and an increased number of cyberattack incidents, Zero-Trust principles are the need of the hour. Unlike traditional systems, they enforce strict access controls and continuous user authentication to combat external attacks and insider risks.
However, Zero Trust Security alone cannot guarantee absolute security. Cyber incidents can still occur, resulting in financial and reputational damage. Therefore, combining Zero Trust with a cyber insurance policy ensures comprehensive coverage. It helps in managing security risks and protects financial and mental sanity.
If you're looking for a comprehensive cyber insurance policy, explore Policybazaar for Business to find the ideal coverage for your cybersecurity needs!
Disclaimer: Above mentioned insurers are arranged in alphabetical order. Policybazaar.com does not endorse, rate, or recommend any particular insurer or insurance product offered by an insurer.
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