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Celebrating the Past, Present and Future of Navy Cryptology

Month

July 2020

Honoring CDR Joseph Harrison, Commanding Officer, CWA-66

Tomorrow Commander Joseph Harrison will be relieved by Commander James L. Hammersla III, as the Commanding Officer, Cryptologic Warfare Activity Sixty Six.   Commander Harrison’s biography follows:

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The Origination and Evolution of Radio Traffic Analysis – The Level of Traffic Analysis Before World War II (Part 6 of 6)

The increase in effectiveness of Japanese communications security practices in 1934 and 1935 succeeded in denying some communications intelligence information to the U.S., but the Navy continued to refine its techniques in the COMINT-COMSEC “battles” of the mid- and late 1930s.

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The Origination and Evolution of Radio Traffic Analysis – Conclusions and Recommendations from 1933 (Part 5 of 6)

The Orange secret maneuvers of 1930 were analyzed through decryption of the ciphers employed. Here (1933) an effort has been made to obtain the same and by attack from an entirely different angle.

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RADM Kathleen M. Creighton’s New Assignment

The secretary of the Navy and chief of naval operations announced today the following assignment:

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RDML Jeffrey Scheidt’s New Assignment

The secretary of the Navy and chief of naval operations announced today the following assignment:

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The Origination and Evolution of Radio Traffic Analysis – The COMINT Exploitation of the 1933 Maneuvers (Part 4 of 6)

The 1933 maneuvers followed the magnitude and general pattern of the 1930 Grand Maneuvers and confirmed the Navy’s belief that they were a rehearsal of the Japanese war plans. By 1933, Lieutenant Wenger, aboard the USS Augusta and head of radio intelligence for the Asiatic Fleet, had 36 men, all of whom were to participate in the exploitation experiment. (In 1930, the Navy’s COMINT organization in the Pacific was one fourth the size.)

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