The Newmanry History

36A Page 288



36 CHI-BREAKING FROM CIPHER



36A History and Resource.

36B Rectangles and Chi 2 Cap Runs

36C Times

Mr. Newman's section began as a section for setting messages on wheels

Bream started to use P5 limitation regularly in the middle of December,

Significance tests were gradually instituted and methods improved. Soon

Between July and November 1944 the number of computers increased from 4 to

From August onwards extensive rectangling was rarely applied to any

From the middle of November 1944 to May 1945 the number of machines and

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