TheCodeBreakers
years later, in 1825—and did not budge out of that rank for 14 years.
But he remained a
first lieutenant only three years before he was promoted to captain
and company commander, a post he held for nine years. He retired in
1852 with the rank of major, and though he served from 1860 to 1868 as
the commander of a National Guard-like battalion, he found sufficient
leisure to devote some to cryptology, for in 1863 his short but epochal
book was published in Berlin by the respected house of Mittler & Sohn.
Three quarters of Die Geheimschriften und die Dechif-frir-kunst
concentrates on answering the problem that had vexed cryptanalysts for
more than 300 years: how to achieve a general solution for
polyalphabetic ciphers with repeating keywords. (One chapter zeroes in
on "The Decipherment of French Writing"—a rather ominous portent in a
book dedicated to the Count Albrecht von Roon, the Prussian minister of
war who molded the army that humbled France only seven years later.)
annaabi.ee 
