Blacker (security)

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Blacker (styled BLACKER) is a U.S. Department of Defense computer network security project designed to achieve A1 class ratings (very high assurance) of the Trusted Computer System Evaluation Criteria (TCSEC).[1][2]

The first Blacker program began in the late 1970s, with a follow-on eventually producing fielded devices in the late 1980s.[3] It was the first secure system with trusted end-to-end encryption on the United States' Defense Data Network.[4]

The project was implemented by SDC (software) and Burroughs (hardware), and after their merger, by the resultant company Unisys.[5]

See also[edit]

  • RED/BLACK concept for segregation of sensitive plaintext information (RED signals) from encrypted ciphertext (BLACK signals)


  1. ^ Weissman, Clark (1992). "BLACKER: security for the DDN examples of A1 security engineering trades". Proceedings 1992 IEEE Computer Society Symposium on Research in Security and Privacy. pp. 286–292. doi:10.1109/RISP.1992.213253. ISBN 0-8186-2825-1. S2CID 6825365.
  2. ^ Weissman, Clark (1995-01-24). "Handbook for the Computer Security Certification of Trusted Systems". Archived from the original on 2012-12-12. Retrieved 2007-12-02.
  3. ^ Sidney G. Reed, Richard H. Van Atta, and Seymore J. Deitchman (1990). "DARPA Technical Accomplishments: An Historical Review of DARPA Projects" (PDF). 1. IDA Paper P-2192: 20-18–20-20. Archived (PDF) from the original on July 18, 2019. {{cite journal}}: Cite journal requires |journal= (help)CS1 maint: multiple names: authors list (link)
  4. ^ Pike, John (2000-02-11). "BLACKER, an article at the Intelligence Resource Program". Retrieved 2007-12-02.
  5. ^ Steve Kent (1996-06-19). "Re: Network Layer Encryption History and Prior Art". ipsec mailing list.