Cipher A. Deavours

UNICITY POINTS IN CRYPTANALYSIS

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THE TURING BOMBE: WAS IT ENOUGH?

The effectiveness of Alan Turings original bombe design is discussed in this article along with organizational methods of implementing it via a microcomputer. To illustrate the material presented, a three part German Werhmacht message is solved.

Lobsters, crabs, and the Abwehr enigma

A variant of the Enigma cryptograph used by the Abwehr (German secret police) before and during WWII is discussed along with several cryptanalytic weaknesses exhibited by the machine.

Chaocipher enters the computer age when its method is disclosed to Cryptologia editors

John F. Byrne invented Chaocipher in 1918 and tried unsuccessfully for almost 40 years to interest the U.S. government in his cipher system. He offered a reward to anyone who could break his cipher but the reward was never claimed. In 1989, John Byrne, son of John F. Byrne, demonstrated Chaocipher to two Cryptologia editors to determine if it had any commercial value. After making some improvements and providing additional information they jointly issue a new challenge to would-be solvers.

THE BLACK CHAMBER

We may not be able to make you love reading, but the black chamber will lead you to love reading starting from now. Book is the window to open the new world. The world that you want is in the better stage and level. World will always guide you to even the prestige stage of the life. You know, this is some of how reading will give you the kindness. In this case, more books you read more knowledge you know, but it can mean also the bore is full.

ENIGMA BEFORE ULTRA THE POLISH SUCCESS AND CHECK (1933–1939)

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THE ENIGMA PART I HISTORICAL PERSPECTIVES

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THE SWEDISH HC-9 CIPHERING MACHINE

The HC-9 ciphering machine was used in Sweden after World War II. It satisfied the need for a simple key-setting process and the requirement of resistance to cryptanalysis by reduction of the risk of error when operated. The machine uses a punched card system instead of pin wheels and a drum with 16 changeable mixed alphabets which interrelated with the card reading mechanism and rotates after each letter is enciphered. The enciphering/deciphering process is described along with the machines operating principles.

CRYPTOLOGY COURSES AT KEAN COLLEGE

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THE BLACK CHAMBER: A COLUMN SHUTTING OFF THE SPIGOT IN 1981

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