Exhibits
Exhibit 1. Recovered Decode Chart of Text for J-19 Transposition System.
From "Japanese Diplomatic Network and Crypto Systems, Pre-During (sic) the War."
National Archives and Records Administration (NARA), College Park, MD. RG 457, E9032, Box 992, Folder 3015.
Exhibit 2. Japanese J-19 Transposition Matrix or Stencil.
Stencil is from period 11-21 November 1941.
"Change No. 4 to R.I.P. 37B, 1 April 1944."
NARA, RG 457, E9032, Box 1137, Folder 3762, 7–119
Exhibit 3. Intercept copy of Japanese Diplomatic Message No. 2353,
Tokyo to ...
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