BLACK
Designation for data that consists only of cipher text, and for information system equipment items or facilities that handle only cipher text. Example: "BLACK key". (See: BCR, color change, RED/BLACK separation. Compare: RED.)
Senses
1 (N)
Designation for data that consists only of cipher text, and for information system equipment items or facilities that handle only cipher text. Example: "BLACK key". (See: BCR, color change, RED/BLACK separation. Compare: RED.)
- IETF RFC 4949 (Internet Security Glossary)Jan 06, 2026RFC 4949 — Internet Security Glossary (Version 2)https://www.rfc-editor.org/rfc/rfc4949.txtRFC 4949 is published by the IETF Trust and marked as "Distribution of this memo is unlimited". Verify IETF Trust copyright/licensing terms for reuse.Source: IETF RFC 4949 (rfc-editor.org).
2 (O) /U.S. Government/
"Designation applied to information systems, and to associated areas, circuits, components, and equipment, in which national security information is encrypted or is not processed." [C4009]
- IETF RFC 4949 (Internet Security Glossary)Jan 06, 2026RFC 4949 — Internet Security Glossary (Version 2)https://www.rfc-editor.org/rfc/rfc4949.txtRFC 4949 is published by the IETF Trust and marked as "Distribution of this memo is unlimited". Verify IETF Trust copyright/licensing terms for reuse.Source: IETF RFC 4949 (rfc-editor.org).
3 (D)
Any data that can be disclosed without harm.
Deprecated Definition: IDOCs SHOULD NOT use the term with definition 3 because the definition is ambiguous with regard to whether or not the data is protected.
- IETF RFC 4949 (Internet Security Glossary)Jan 06, 2026RFC 4949 — Internet Security Glossary (Version 2)https://www.rfc-editor.org/rfc/rfc4949.txtRFC 4949 is published by the IETF Trust and marked as "Distribution of this memo is unlimited". Verify IETF Trust copyright/licensing terms for reuse.Source: IETF RFC 4949 (rfc-editor.org).