"dgory" - 1 õppematerjal

TheCodeBreakers

Transcribed line by line according to the numbers (s under 1 first, D under 2 second, etc.), prefixed with system indicator GIGIG and key indicator AUDOB, the message number, and the telegraphic abbreviation of Sikuyu ("urgent"), the message (with three more errors: the Y under 13 became the J in CJYHH, the F under 2 became the E in IYJIE, and the T under 9 became the i in AUIAY) became the one actually sent over Kita's name: GAIMUDAIJIN TOKIO SIKYU 02500 GIGIG AUDOB SDEAT QYOUB DGORY HJOIQ YLAVE  AUIAY CJYHH IYJIE ALBIN KITA PA-K2 did not pose much of a problem to experienced American cryptanalysts. ROchefort estimated that his unit could crack a PA-K2 message in from six hours to six days, with three days a good average. The transposition was vulnerable because each line was shuffled identically; the cryptanalyst could slice a cryptogram into groups of 15 or