What is Bracketing in Cybersecurity?

When it comes to cybersecurity, access control is critical, and that’s where bracketing shines. Bracketing strategies aim to reduce the attack surface by ensuring that users, applications, or systems only interact with the resources they truly need.

For example, a marketing employee doesn’t need access to sensitive HR files, and a temporary worker shouldn’t retain access to internal systems past their work period. Bracketing applies this logic systematically, helping to enforce the principle of least privilege (PoLP). PoLP is one of the most important security concepts you need to know. It ensures that users, systems, and applications only have access to the data and tools absolutely necessary for their tasks. No more, no less.

This concept is often embedded within broader cybersecurity frameworks like privilege management and role-based access control (RBAC). Bracketing helps organizations stay safer by reducing the risk of accidental or intentional misuse of sensitive resources. Plus, if a threat actor gains access to a user’s account, bracketing naturally limits the damage they can cause.

Think of it as closing doors behind you when you walk through a highly secured building. You only leave open what absolutely needs to be open—for as short a time as possible. Efficient, no?

Why Is Bracketing Important?

Because breaches happen. By limiting access, bracketing ensures that even if someone sneaks in, they’re confined to a small part of the system, minimizing damage and making recovery much easier. It’s a proactive security measure that’s easy to integrate into systems with robust access control setups.

Where Do You See Bracketing in Action?

You might have heard of "vault-like systems" in the cloud or how companies allow admin rights for specific tasks only. These are practical examples of bracketing concepts turned into real-world applications.

Want an official take? The National Institute of Standards and Technology (NIST) emphasizes the importance of this strategy in their documentation on managing the principle of least privilege (NIST guide).