NIST Highlights Unique Security Challenges in Multi-Cloud Environments

The US National Institute of Standards and Technology has published guidance identifying 23 distinct security challenges that arise when organisations operate across multiple cloud service providers. The guidance highlights risks that are specific to multi-cloud architectures, including inconsistent identity and access management across platforms, difficulties in maintaining unified visibility and logging, challenges in enforcing consistent security policies, and increased complexity in incident response and forensic investigation. NIST has called on the cybersecurity community to develop practical solutions to these challenges, recognising that multi-cloud adoption is now the norm for many enterprises but that security tooling and practices have not kept pace with the architectural shift.

Why this matters for UK organisations

Multi-cloud strategies are increasingly common among UK organisations, driven by a desire to avoid vendor lock-in, meet regulatory requirements for data residency, leverage best-of-breed services from different providers, or support merger and acquisition activity. However, operating across AWS, Microsoft Azure, Google Cloud and other platforms introduces significant security and governance complexity. Each provider has its own identity model, logging format, network architecture, encryption approach and compliance framework. Security teams must maintain expertise across multiple platforms, integrate disparate tooling, and ensure that policies are consistently applied even when the underlying technical controls differ. The NIST guidance is a useful acknowledgment that multi-cloud security is not simply about applying the same controls in multiple places, but about understanding and managing the unique risks that emerge from operating across heterogeneous environments. For UK organisations, this is particularly relevant where regulatory obligations require consistent security controls, audit trails and incident response capabilities across all environments where data is processed.

What to review

Organisations operating multi-cloud environments should review whether security, identity and logging practices are consistent across all cloud platforms in use. This includes confirming whether they have unified visibility into access, configuration and activity across providers, whether incident response processes account for multi-cloud complexity, and whether security teams have the skills and tooling needed to manage risk effectively in heterogeneous cloud architectures. Organisations should also consider whether identity and access management policies are consistently enforced across platforms, whether logging and monitoring data is aggregated in a way that supports effective threat detection and investigation, and whether security policies are translated appropriately to account for differences in how each cloud provider implements controls. This is also a useful prompt to review whether responsibility for multi-cloud security governance is clearly assigned, whether security teams have access to training and resources that cover all platforms in use, and whether the organisation's security architecture is designed to manage complexity rather than simply replicate single-cloud controls across multiple environments.

Source: Infosecurity Magazine