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Introductions and Definitions
Complete Columnar Tramps
13 other sections not shown
analysis appears belongs to Group Bifid block width Brown corpus character ciphertext letter column length Columnar Tramps columnar transposition Complete Columnar consonants cont'd correlation count crypt Cryptanalysis Cryptogram deciphering digram frequencies enciphering encipherment English entry F G H follows four-square cipher geometric average going GOSUB GOTO guess index of coincidence initial letter INPUT intermediate text key length key letter key square letter frequencies long columns look match matrix method NEXTK number of columns number of letters occurs output buffer pattern words percent plaintext letter Playfair pointer polyalphabetic position preferences possible precedes PRINT ENTER probable word railfence random repeat scrambled short columns shown in Fig Simple Substitution skip squeeze out blanks subroutine substitution cipher Suppose terminal ters translated transposition cipher two-letter words vector Vigenere vowels write zero