TheCodeBreakers
message, so the enciphering keys, and consequently the ciphertexts of all
messages enciphered in this system, would bear no exploitable relation
to one another. Not only would the transposition keys differ, the very
widths of the blocks would as well—this being a variable stemming from
the key derivation. This kills any last hope of an analysis by comparing
messages. The poor cryptanalyst would even be denied the consolation of
discovering a common origin of the cryptograms through
fyccKaH Kpunmojiozun. 377
similarities in frequency counts, for the coordinates themselves would
change. Any solution would thus have to be effected on the basis of a
single message. It would require trying every sensible pattern of
transposition until one was found that yielded a monoalphabetic
frequency count of the digits. A complication greatly increases the
difficulty of finding this pattern, just as the straddling effect increases
the difficulty of getting a valid frequency count
annaabi.ee 
