OPSEC (operations security) is generally defined as a process used to identify and protect critical information so adversaries cannot exploit it.

Core OPSEC definition

  • OPSEC is a risk management and analytical process for preventing sensitive or critical information from being observed, collected, and used by an adversary.
  • It focuses on identifying what information is critical, how it might be exposed, who might want it, and what measures are needed to reduce or block that exposure.

Key elements that “define” OPSEC

Most formal definitions agree OPSEC is defined by these elements:

  • Identifying critical information that would harm an operation, mission, or organisation if exposed.
  • Analysing threats and potential adversaries who might try to obtain that information.
  • Identifying vulnerabilities in processes, technology, and human behaviour that could leak information.
  • Assessing the risk created by those vulnerabilities.
  • Applying countermeasures (technical, procedural, and behavioural) to eliminate or reduce adversary exploitation.

What OPSEC is not

When choosing “which of the following define OPSEC,” statements like the following would usually not be correct definitions:

  • “OPSEC is only about encryption or firewalls” – that is just one small part of security, while OPSEC covers broader behaviour and processes.
  • “OPSEC is just secrecy or paranoia” – OPSEC is structured, risk-based decision making, not hiding everything for its own sake.

Example of a correct answer choice

If your question is multiple choice, the most accurate option will look something like:

“A process that identifies critical information, analyses threats and vulnerabilities, evaluates risk, and applies countermeasures to prevent adversaries from exploiting that information.”

That wording captures the standard OPSEC definitions used in military, government, and cybersecurity contexts.

Information gathered from public forums or data available on the internet and portrayed here.