Department of Defense
INSTRUCTION
NUMBER 8523.01
April 22, 2008
ASD(NII)/DoD CIO
SUBJECT: Communications Security (COMSEC)
References: (a) DoD Directive C-5200.5, “Communications Security (COMSEC) (U),”
April 21, 1990 (hereby canceled)
(b) DoD Instruction 5025.01, “DoD Directives Program,” October 28, 2007
(c) DoD Directive 5144.1, “Assistant Secretary of Defense for Networks and
Information Integration/DoD Chief Information Officer (ASD(NII)/DoD
CIO),” May 2, 2005
(d) Committee on National Security Systems Policy (CNSSP) No. 1, “National
Policy for Safeguarding and Control of COMSEC Materials,” September
2004
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(e) through (p), see Enclosure 1
1. PURPOSE
This Instruction:
1.1. Reissues and renumbers Reference (a) as a DoD Instruction in accordance with the
guidance in Reference (b) and the authority in Reference (c).
1.2. Establishes and implements DoD COMSEC policy in accordance with Reference (d)
and DoD Directive (DoDD) 8500.01E (Reference (e)).
1.3. Supersedes DoD Instructions 4660.2, 5210.74, and S-5225.1 (References (f), (g), and
(h)).
1.4. Authorizes the publication of implementing procedures for COMSEC.
2. APPLICABILITY AND SCOPE
This Instruction:
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Available at http://www.cnss.gov
