Titlebook: Code Breaking in the Pacific; Peter Donovan,John Mack Book 2014 Springer International Publishing Switzerland 2014 Breaking additive syste

BATE

Advances in Information SecurityThis chapter discusses methods of attacking additive systems whose book groups are randomly chosen, rather than all being multiples of three. The whole process is much harder. Captured documents often helped in the later years of the Pacific War.

GRIN

利用

Communications and SigintThis chapter gives a brief account of the early development of telegraphic and radio communication systems and of the use of message interception techniques to obtain intelligence of diplomatic or operational value. Thus modern Signals Intelligence was born.

conjunctivitis

启发

与野兽博斗者

Breaking Additive SystemsThis chapter discusses methods of attacking additive systems whose book groups are randomly chosen, rather than all being multiples of three. The whole process is much harder. Captured documents often helped in the later years of the Pacific War.

FADE

Making Additive Systems SecureThis chapter is to some extent a continuation of Sect. 8.19, which gave some general maxims about cipher security in the WW2 era, but its focus is now on additive systems. After some general remarks on secure use of such systems, subsequent sections investigate techniques for improving the security of their various components.

conscribe

Fibrillation

Preparedness for Attack?gest that it is quite unlikely that such foreknowledge came from JN-25B. Yet three important items of . intelligence (but not . intelligence) were obtained from JN-25B in the weeks preceding the raid. These, when combined with other available intelligence, indicated that there was a very high risk that American territory would be attacked.

sparse