TheCodeBreakers
18. Heterogeneous Impulses
FEW FALSE IDEAS have more firmly gripped the minds of so many
intelligent men than the one that, if they just tried, they could invent a
cipher that no one could break. Many have tried and, although only a
fraction of their
ciphers have been published or patented, the quantity and variety of
even this small sample is astounding.
Emile Myzskowski, a retired French colonel, devised a kind of
repeated-key transposition and published it in his Cryptographic
indechiftruble. Collon, a Belgian Army officer, proposed a number of
fractionating systems. One Rozier marched his plaintext letters through
the interior of a Vigenere tableau in a dizzily twisting path in an attempt.
to lose the cryptanalyst. The so-called Phillips cipher enciphers five
letters monoalphabetically in a 5 X 5 square, then shifts the lines of the
square and repeats the process. The Amsco transposition cipher acepts
both single letters and pairs as its plaintext elements. A. de Grandpre
annaabi.ee 
