Note: Communications security includes cryptosecurity, transmission security, emission security[?], and physical security of COMSEC material[?].
Source: from Federal Standard 1037C and from MIL-STD-188 and from the National Information Systems Security Glossary and from the Department of Defense Dictionary of Military and Associated Terms
... E. Stevenson[?] Republican 1869-1871
John J. Jacob[?] Democratic 1871-1877
Henry M. Mathews[?] Democratic 1877-1881
Jacob B. Jackson[?] Democratic 1881-1885 ...
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