July 13, 2023
A security framework that verifies every access request continuously instead of trusting based on network location.
Zero Trust represents a contemporary security framework that validates each access request as though it originates from an untrusted network. The approach eliminates implicit trust assumptions and presumes potential compromise regardless of request origin or target resource. The foundational concept teaches organizations to "never trust, always verify."
Principles of Zero Trust
Zero Trust functions as a collection of principles rather than a single product. Key principles include:
- Verify explicitly: Always authenticate and authorise based on all available data points, including user identity, location, device health, service or workload, data classification, and anomalies.
- Use least-privilege access: Limit user access with just-in-time and just-enough access (JIT/JEA), risk-based adaptive policies, and data protection to help secure both data and productivity.
- Assume breach: Minimise blast radius and segment access. Verify end-to-end encryption and use analytics to get visibility, drive threat detection, and improve defences.
Flaws of VPNs and How Zero Trust Solves Them
Traditional VPNs present multiple security limitations that Zero Trust addresses:
- VPNs create a false sense of security: VPNs operate on assumptions that authenticated users warrant trust, ignoring compromised credentials and insider threats. Zero Trust instead verifies every access request at every step, regardless of whether the user is on or off the network.
- VPNs are complex and costly to manage: Infrastructure demands, maintenance overhead, and performance issues plague traditional VPN deployments. Zero Trust leverages scalable cloud-based solutions without requiring additional software configuration.
- VPNs provide poor user experience: Cumbersome authentication processes and frequent disconnections frustrate users, potentially encouraging security workarounds. Zero Trust provides seamless access through modern authentication methods while maintaining security controls.
Benefits of Zero Trust
Organizations implementing Zero Trust can achieve:
- Secure hybrid work: Enhance the employee experience with adaptable security policies that help you effectively manage and protect all your devices and identities, no matter where people choose to work.
- Enable digital transformation: Accelerate cloud migration and adoption of SaaS applications with intelligent security for today's complex environment.
- Close security gaps: Reduce security vulnerabilities with expanded visibility across your digital environment, risk-based access controls, and automated policies.
- Minimise the impact of bad actors: Safeguard your organisation from both internal and external risks with a layered defence that explicitly verifies all access requests.
- Get ahead of regulatory requirements: Keep up with the evolving compliance landscape with a comprehensive strategy that helps you seamlessly protect, manage, and govern your data.
How to Implement Zero Trust
Zero Trust adoption represents an iterative journey requiring continuous assessment. Organizations should identify critical assets, map workflows, then apply Zero Trust principles progressively.
The National Institute of Standards and Technology (NIST) developed Zero Trust Architecture (ZTA), which provides guidance on design, deployment, and operation using existing technologies. ZTA comprises three main components: policy engine, policy administrator, and policy enforcement point. The framework defines seven logical components: data, assets, actors, networks, devices, gateways, and applications.
The Cloudflare Zero Trust Platform offers Internet-native security for hybrid work environments. It verifies, filters, isolates, and inspects all traffic on all devices you manage, and even devices you don't. The platform provides single-pass inspection and delivers a 100% uptime SLA for paid plans through Anycast architecture.
Examples of Zero Trust
- Remote desktop: Implement multifactor authentication or biometrics before access. Require end-to-end encryption for sessions and limit access by time or location.
- SSH: Users must verify identity using public key cryptography or certificates. SSH servers should enforce strict access policies, monitor session activity, and alert administrators of suspicious behavior.
- FTP: Users authenticate with strong passwords or tokens. Servers restrict directory/file access based on user role and encrypt data in transit and at rest.
Final Thoughts
Zero Trust constitutes a business necessity rather than a trend. Implementation enhances security posture, improves user experience, enables digital transformation, and provides competitive advantages. Organizations interested in learning more are invited to contact Tekcent for consultation on designing and implementing a Zero Trust strategy.