Operations Security, in one form or another, has been around for as long as there were secrets that needed to be kept. It wasn’t always called OPSEC, but the core concepts of identifying and protecting critical information have always been a deciding factor in war, in business, and countless other ventures.
“it is by comparing a variety of information, we are frequently enabled to investigate facts, which were so intricate or hidden, that no single clue could have led to the knowledge of them. . . intelligence becomes interesting which but from its connection and collateral circumstances, would not be important.” -George Washington
“Security programs and procedures already exist to protect classified matters. However, information generally available to the public as well as certain detectable activities reveal the existence of, and sometimes details about, classified or sensitive information or undertakings. Such indicators may assist those seeking to neutralize or exploit U.S. Government actions in the area of national security. Application of the operations security (OPSEC) process promotes operational effectiveness by helping prevent the inadvertent compromise of sensitive or classified U.S. Government activities, capabilities, or intentions.” –Ronald Regan in NSDD 298