TheCodeBreakers
compare in speed with a nomenclator encipherment. The well-informed
author of an anonymous 17th-century "Traitte de 1'art de deschiffrer" in
the Royal Archives at Brussels stated that chancelleries do not use
polyalphabetics because it takes too long to encipher them and because
the dropping of a single ciphertext letter garbles the message from that
point on. In 1819, William Blair, in a superb encyclopedia article
abcdefghiJklmnopqrstuvwxyz
A ABCDEFGHIJKLMNOPQRSTUVWXYZ
B BCDEFGHIJKLMNOPQRSTUVWXYZA
C CDEFGHIJKLMNOPQRSTUVWXYZAB
D DEFGHIJKLMNOPQRSTUVWXYZABC
E EFGHIJKLMNOPQRSTUVWXYZABCD
P FGHIJKLMNOPQRSTUVWXYZABCDE
Q GHIJKLMNOPQRSTUVWXYZABCDEF
H HIJKLMNOPQBSTUVWXYZABCDEFQ
I IJKLMNOPQHSTUVWXYZABCDEFGH
J JKLMNOPQBSTUVWXYZABCDEFGHI
K KLMNOPQBSTUVWXYZABCDEFGHIJ
L LMNOPQRSTUVWXYZABCDEFGHIJK
M MNOPQRSTUVWXYZABCDEFGHIJKL
N NOPQRSTTUVWXYZABCBEFGHIJKLM
O OPQRSTUVWXYZABCDEFGHIJKLMN
P PQBSTUVWXYZABCDEFGHIJKLMNO
annaabi.ee 
