The National Security Agency (NSA) is the Nation's crypto-logic organization.  It coordinates, directs, and performs highly specialized activities to protect the US information systems and produce foreign intelligence information.  A high technology organization, NSA is on the frontiers of communications and data processing.  It is also one of the most important centers of foreign language analysis and research within the Government.

The ability to understand the secret communications of our foreign adversaries while protecting our own communications -- a capability in which the US leads the world -- gives our nation a unique advantage.

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The Air Force Security Service's (AFSS) primary function is to conduct on-land and airborne electronic reconnaissance to obtain foreign intelligence information, on-land, underwater, and airborne visual and electronic  information necessary to keep our country in its best defense posture. This reconnaissance activity provides our nation with timely and reliable intelligence concerning potentially unfriendly forces.

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Within NSA AF Security Service there was a special unit called the Special Security Office (SSO).

The following description of this "Unit" was provided in 2009 by Wikipedia Encyclopedia at:   http://en.wikipedia.org/wiki/Special_Security_Office

"This unit function within multiple arms of the United States federal government and armed forces with the mission to provide a reliable and secure means to receive and disseminate Sensitive Compartmented Information (SCI) and Special Access Programs (SAP) to authorized recipients in the United States government and military organizations.  In the military, they are administered by the Defense Intelligence Agency.

Systematic handling of compartmented information probably is most associated with the Special Liaison Units (SLU) originally for the distribution of British ULTRA COMINT ^[1].   Cleared personnel in these units and the equivalent US Special Security Offices (SSO), usually brought material to indoctrinated recipients, perhaps waited to answer questions, and took back the material.   In some large headquarters, there was a special security reading room."