Before revision: World War II propaganda poster which popularized the cautionary phrase "Loose lips sink ships" Operations security (OPSEC) or operational security is a process that identifies critical information to determine if friendly actions can be observed by enemy intelligence, determines if information obtained by adversaries could be interpreted to be useful to them, and then executes selected measures that eliminate or reduce adversary exploitation of friendly critical information.
After revision: World War II propaganda poster which popularized the cautionary phrase "Loose lips sink ships" Operations security (OPSEC) or operational security is a process that identwhetheries critical information to determine if friendly actions can be observed by enemy intelligence, determines if information obtained by adversaries could be interpreted to be useful to them, and then executes selected measures that eliminate or reduce adversary exploitation of friendly critical information.