Zero Trust Architecture for Mobile Network Security Operations
Executive Summary
The traditional perimeter-based security approach is insufficient for safeguarding critical infrastructure against evolving threats, especially advanced persistent threats (APTs) from sophisticated adversaries. Implementing a Zero Trust Architecture (ZTA) can mitigate these risks by securing micro-perimeters across the entire mobile network. This whitepaper outlines a comprehensive approach to automating and orchestrating network security operations, helping mobile network operators (MNOs) align with the US National Institute of Standards and Technology (NIST) and the US Cybersecurity and Infrastructure Security Agency (CISA) guidelines. It emphasizes the importance of integrating visibility, analytics, automation, orchestration, and governance functions as per the CISA ZTMM.
Introduction
Recent technological advancements, regulatory focus, and the rise of sophisticated threats have necessitated a shift towards a Zero Trust Architecture (ZTA) in telecommunications. ZTA complements traditional perimeter defenses by adopting a principle of continuous verification and monitoring, assuming threats exist both internally and externally. This is crucial for maintaining cyber resilience, especially in light of increasing regulatory requirements like the NIS 2 directive in the European Union. The telecom industry, starting with the development of 5G specifications, has prioritized security, recognizing the need for ZTA in mobile networks.
The Evolution of Zero Trust Architecture
Traditionally, security focused on protecting networks through perimeter controls. However, with the advent of cloud computing and agile development practices, the landscape has evolved, introducing new vulnerabilities. ZTA addresses these by establishing micro-perimeters and applying security measures across the entire network, ensuring protection from both external and internal threats. This approach includes identity and access management, least privilege, multi-factor authentication, network segmentation, and continuous monitoring.
Challenges and Guidance for Implementation
Implementing ZTA in mobile networks involves overcoming specific challenges related to the unique nature of telco infrastructure. Key areas of focus include visibility and analytics, automation and orchestration, and governance. This whitepaper provides guidance on how MNOs can systematically implement these aspects across their operations, aiming for a high level of automation and visibility to protect against evolving threats. Ericsson's solutions are designed to facilitate this transition, offering capabilities that align with ZTA principles and support the overall journey towards a secure mobile network environment.
Conclusion
Achieving a Zero Trust Architecture in mobile networks requires a holistic approach that integrates advanced security practices and technologies. By focusing on visibility, analytics, automation, orchestration, and governance, MNOs can effectively manage and mitigate risks, ensuring robust security postures that adapt to the dynamic threat landscape. Ericsson's security management solutions are instrumental in this process, providing tools and methodologies that enable MNOs to achieve a mature ZTA aligned with industry standards and regulatory requirements.
