Byeman Control System
Byeman Control System
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Byeman Control System

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Byeman Control System

The BYEMAN Control System, or simply BYEMAN (designated BYE, or B), was a security control system put in place to protect information about the National Reconnaissance Office and its operations.

The BYEMAN Control System (BCS) was put in place in 1961 by the Central Intelligence Agency.

It was revealed that Ana Montes, a former senior analyst at the Defense Intelligence Agency who spied for Cuba, had been granted access to the classified BYEMAN system, which provided her access to satellite data. Although she had never actually viewed any intelligence within the system, Montes later admitted during a post-arrest debriefing that she had informed the Cubans of the system’s existence.

Discussions regarding BCS retirement were held as early as 2003. NRO Director Peter B. Teets spoke at a 2003 NRO Town Hall meeting, mentioning that retiring the BCS would remove barriers that prevented the NRO and U.S. Intelligence Community from working together as a team.

The use of BCS was so prevalent throughout the U.S. Intelligence Community, that a handful of websites were set up to direct users through the retirement process.

An individual inside the CIA's Special Security Center chose the name from a random list of four words drawn from the CIA's codeword file. A byeman is a man who works underground; it is unknown if the individual knew the word's meaning before its selection.

This is a small list of the publicly acknowledged programs that were held within the BCS:

While many other NRO programs resided within the BCS, their codenames have not been made public through proper disclosure or official declassification.

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