The Naval Security Group (NAVSECGRU) was an organization within the United States Navy, tasked with intelligence gathering and denial of intelligence to adversaries. A large part of this is signals intelligence gathering, cryptology and information assurance. The NAVSECGRU organization was active from March 1935 to September 2005.
The NAVSECGRU organization was transferred to the Naval Network Warfare Command (NETWARCOM) where its former assets make up the Information Operations Directorate. The service cryptologic commander role was transferred to United States Tenth Fleet 29 January 2010.
- Chief Journalist (SW/AW) Joseph Gunder, Naval Network Warfare Command Public Affairs (2005-10-05). "Naval Security Group Aligns with NETWARCOM". Retrieved 2007-07-11.
The Navy has integrated all of its Information Operations (IO) capabilities under one authority by formally disestablishing Naval Security Group Command (NAVSECGRU) and aligning its personnel and assets under Naval Network Warfare Command (NETWARCOM).
- United States Navy, Chief of Naval Operations (July 23, 2009), Fleet Cyber Command/Commander Tenth Fleet Implementation Plan, (Memorandum) (PDF), retrieved 2009-11-18
- Navy Stands Up Fleet Cyber Command, Reestablishes U.S. 10th Fleet, NNS100129-24
- "Commander Naval Security Group History". Archived from the original on 2007-05-07. Retrieved 2007-07-11.