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on 30 April 1997
The 1967 edition of this book is and always will be a classic. What a disappointment to find that this new edition offers such a poor updating of new information which has come to light over the last the 30 years. If the revelations of the 1970s about the Enigma decrypts and the Bletchley Colossus machines did not warrant at least a major chapter, what does? (They get only brief treatment in the new 15 page addendum.) Numerous other omissions come to mind. This book deserved better for its new edition.
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on 16 March 2013
This is not fiction. It is fact and covers secret codes through the ages. It is fascinating to read and covers the full history of codes.

I am concerned about internet security and read all the methods of secret codes and code breaking to ensure that I retain secure transactions.

There are a lot of pages to read (over 1,000) so it will take a while to digest it all.

Excellent value for money.
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on 28 August 1998
David Kahn's newest book updates his previous work, which sits on every Cryptographer's, Cryptanalyst's, and government Special Intelligence officer's bookshelf in the entire world. If you REALLY want to how ciphers, codes, and systems are broken, Kahn is the author who tells you. Any person knowledgable in the field of Cryptology or Intelligence will tell you that Kahn' book has never been equalled. It is known as "The Bible of Cryptology" within the field.
From early Sparta and Rome to the present day, the strengths and weaknesses of systems and devices are presented in clear, concise terms -- occassionally with a bit of levity, where appropriate. Novices in the field will find much useful -- and highly interesting -- information. Professionals always find reminders of the fallability of "unbreakable" systems.
Kahn's writing style is clear, concise, and analytical. It is never boring.
I was employed by a maker of Cryptographic equipment, and was authorized to discuss key generator and cipher system issues with the heads of national governments. A copy of "Codebreakers" was our most requested -- and welcomed gift. That speaks more eloquently than any words I might craft.
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on 1 June 2013
A good overview of the history of cryptography, but it could be more detailed while being an easy reading for anyone without knowledge of the field.
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on 21 August 2013
This is a massive tome of a book and will take a long time to read, but I had involvement and have remained interest in all aspects of ciphers.
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on 11 September 2014
Interesting, though history still has not revealed all but this is a must for anybody needing to know about code breaking
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on 12 January 2015
Brilliant book and a great read also came very quick thank you ******
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on 11 September 2009
It is big, sometimes it is boring, and it has a lot of details sometimes you don't want to know. Just skip those pages...
But, it narrates in a great language ALL the history of cryptography through the centuries.
Everybody involved in cryptography, information security etc, must read it.
Great stories of closed doors, princes, kings and recognizable names of the history.
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on 3 January 2015
very good
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