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The Code Book: The Secret History of Codes and Code-Breaking

4.25 of 5 stars 4.25  ·  rating details  ·  11,782 ratings  ·  683 reviews
Combining impeccable history and intriguing stories of espionage and intellectual breakthroughs, this riveting bestseller, by the author of the popular science classic Fermat's Last Theorem, brings to life the secret world of cryptographers and code-breakers from Ancient Egypt to the age of the internet.
Paperback, 402 pages
Published 2000 by Fourth Estate (first published 1999)
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Sep 18, 2008 Jim rated it 5 of 5 stars  ·  review of another edition
Recommends it for: Geeks and people who like geeks.
Shelves: pop-sci-geek
The Code Book is like geek porn. Explanations of the theories behind cryptography are woven together with anecdotes of times when code-making or code-breaking was integral to historical events. Singh strikes an excellent balance with this book. The clarity of his writing makes the explanations of the mathematics of cryptography very straightforward without dumbing them down, and the historical connections are always fascinating.

Personally, my favorite part was the section devoted to the role cry
Shafaet Ashraf
পরায় মাস ধরে পড়ে শেষ করলাম যেকোনো সিনেমাকে হার মানানো করিপটোগরাফির ইতিহাস। এই বইয়ের সতযিকারের মজা নিতে হলে করিপটোগরাফির পরটোকলগুলো বুঝে বুঝে পড়তে হবে, তবে সেগুলো বুঝতে জটিল কোনো গণিত জানার দরকার হবে না, লেখকের দকষতার পরিচয়টা সেখানেই।

পৃথিবীতে বড় বড় সব যুদধগুলো হয়েছে আসলে 'কোডবরেকার' আর 'কোডমেকার' দের মধযে, যারাই পরতিপকষের পাঠানো গোপন চিঠিগুলো পড়ে ফেলতে পেরেছে তারাই কৌশলগত দিক থেকে একধাপ এগিয়ে গিয়েছে। সেই জুলিয়াস সিজারের সিজার সাইফার থেকে শুরু করে নাৎসিদের বযবহৃত এনিগমা মেশিন, আধুন
Arnab Paul
পড়ে শেষ করলাম Simon Singh এর The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography
বইটির সনধান পাই গুডরিডস ঘাঁটাঘাঁটি করতে করতে। Cryptography;অরথাৎ আপনার তথযকে সরবসাধারণের আড়ালে রেখে সংরকষণ ও পরাপককে সরবরাহ করার বিদযা নিয়ে এই বই।হাজার বছর আগের রাজা বাদশাদের আমল থেকে Cryptography-র চরচা শুরু,যার সরোত এখন আপনার সোশাল মিডিয়া অযাকাউনট থেকে সেলফোনের রিচারজ কারডের বযবহারে চলছে সদরপে !চারশো পৃষঠার এই বইটিতে Cryptography-র রোমাঞচকর ইতিহাস , বিকাশের রাজনীতিক পটভূমি ছাড়াও এর গাণি
Singh, author of Fermat's Enigma, has even included a code to practice one's deciphering skills on. The successful cryptanalyst will win $15,000. In the appendix, he discusses other famous attempts at breaking codes, including the recent book, The Bible Code, by Michael Drosnin. This work caused quite a stir a couple of years ago when Drosnin, building really on the work of several Hebrew scholars, claimed to have discovered several prophecies hidden in the text of the Bible, a forecast of the a ...more
I never thought I'd love a book about mathematics, or ever see the beauty of mathematics. My mother was definitely right when she kept pestering me to work harder on my math and argued that it was EVERYWHERE! (I had argued back saying I would be fine as long as I could perform the basic calculations!)
Maybe this is what growing up is about!
That being said, this is a very informative book about the past, present and future of cryptography. Singh takes us on a journey from ancient times where simpl
Stefan Kanev
I recently watched The Imitation Game, which left such a bad taste in my mouth, that I wanted to clean it up with something in a similar subject. Having read two of Sighn's other books, I picked this one.

I had high expectations and it met them nicely. The book tells the story of ciphers and encryption through history – from what the Greek and the Romans did, through the Enigma, and finally to RSA. The style is very easy and pleasant to read, everything is pretty understandable even if you don't
By far the best and the most interesting book on the subject. recommended to anyone interested in Cryptography and its history. I read it in three days mainly because I couldn't put it down.
I thought this book would be dry and boring, but oh no! I love a good puzzle, and this history of making, cracking, and innovating secret codes was enthralling. And it gets better ... at the end of the book there are codes to try your hand out. I got pretty excited when I solved the first (and easiest one). They got harder and the book became overdue at the library so I gave it up. For about a week I had the idea that I was going to be the best code cracker ever and that the CIA would HAVE to hi ...more
I was fascinated with codes and ciphers when I was a kid. I even had a "junior spy code kit" with a bunch of cool stuff and I could send little notes to friends with secret messages like "Mr. Nutzenjammer is a dork" and "Cindy eats her boogers" and we would all congratulate ourselves with our cleverness. That's all pretty juvenile, but the ciphers included in my little spy kit were the basics in modern encryption systems and you can read all about it in Simon Singh's The Code Book, an excellent ...more
Prvně jsem od autora četl knihu Velká Fermatova věta a Kniha kódů a šifer je stejně strhující. I když jsem o šifrování už leccos věděl, ujasnil jsem si pár historických údajů, jako třeba že Enigmu prvně rozlouskli Poláci. I ostatní příběhy z historie jsou rovněž oslavou lidské vynalézavosti. Na jeho psaní se mi líbí, že je to sice populárně naučné, ale své si tam najde začátečník i pokročilý. Netušil jsem, že už je teoreticky připravené šifrování, které by neměl prolomit kvantový počítač. Zajím ...more
Bryce Holt
Prepare to dork out with your bad self, because this book is for those of us who A) Had a code dial as a kid (like Ralphie in "A Christmas Story"), and B) Didn't get laid until at least college. The truth is, though, that Simon Singh's "The Code Book" rocks the pants. This guy's knowledge and history is astounding, and while much of it is beyond me to fully understand, I am enamored with the way the stories unravel.

Enjoyably crafted and with the lay reader in mind, I think many could enjoy this
This is a *must* read before reading Cryptonomicon. Or maybe after, like I did.

If you at all feel uncomfortable in your knowledge of one time pad cyphers, public/private keys, or the importance of really good cryptography for average folks, please read this book! It's sadly a bit out of date, but Singh does such a brilliant job of methodically building up the complexity in cyphers though history, that you will inevitably learn a ton.
i picked this up at my brother in law's house and started reading it, immediately went out and bought a copy....
what a FANTASTIC book...
mathematically oriented non-fiction that reads like an anthology of suspense stories...
highly enjoyable...
History of crypto, from its very beginning to public key cryptography and a sketch of quantum cryptography. Very well written and researched, balancing accuracy, ease-of-reading and entertainment. One of the best non-fiction read recently!
Jigar Brahmbhatt
A tour de force for anyone remotely interested in cryptography. Singh has done a marvelous job of chronologically describing the art of hiding information from the Rosetta stone, to the lesser known message hiding tricks used in Queen Mary's court, followed by the Enigma machine, till the emergence of computers. He backs up the technical details with intriguing history, which only makes up for a wonderful reading experience.

My favorite part in the book was the explanation of Quantum Cryptograph
Julia Hughes
Mr Singh manages to explain concepts that should be way beyond this thickie's level of understanding. That he manages to do so in an entertaining page turning manner is testament to his skill both as a mathematician and a writer. This book examines how from earliest history in parallel with writing, it became necessary for human kind to devise ways to send messages in code. So we learn how complex codes developed from very simple ones, and Simon explains along the way that there are ancient code ...more
A little disappointing given how much I loved Fermat's Last Theorem, although still really well-written. The beginning half was really good, but then when it became about secure internet banking and not wars and beheadings and secret languages it kind of got a little boring. Also it was SUPER Anglo-centric. I don't agree with that choice.

I learned that once in ancient Greece somebody shaved the head of his messenger, wrote the message on his scalp, and then waited for the hair to regrow as a for
This is the second work of Simon Singh that I have read, and in my opinion it is the greater of the two. It explores the art of ciphering codes and encryption which has developed profusely over the centuries, with alot of help from Charles Babbage and the computer.

Singh delves into the story of Mary Queen of Scots and explains in an epic and intersting way about how Mary's life depended upon whether her encrypted messages were deciphered. It goes on to the key role of mathematicians in WWII par
A history of cryptography ought to have spy stories and treasure hunts and daring wartime conspiracies, which Simon Singh provides, but he grounds it all in strikingly clear mathematical and logical explanations of cryptographic methods. He tells the history as a back and forth between cryptographers and cryptanalysts, with one group having the upper hand at different points in history. With the very early ciphers, I already had a background intuition about how they might be deciphered, but by t ...more
I'm fascinated by the history of encryption, so this book was up my alley. Singh traces the evolution of encryption techniques using stories from history to illustrate.

Singh takes care to also give more technical explanations for what's going on, and you can use the charts to try out some of them for yourself.

Just recently, there's the story of the "runic code" that was finally solved - and it turns out it was used mostly for fun (with one of the translated messages saying, simply, "Kiss me"). S
A fantastic exploration of cryptography, looking at the game of leapfrog between the code makers and the code breakers. I was fascinated by the story of the Enigma code as well as the incredible cracking of it. Singh also covers computer encryption in a manner which is easy to understand and fascinating in its detail.

The best part about this book is its accessibility. You don't need to be a mathematician to follow how codes were developed and broken. I was riveted by the development of cryptogra
Skillfully written and engaging history of the 2000+ year old struggle between the people who try to make messages secret and the people who try to decipher them. Singh is brilliant at creating detailed examples phrased for the general reader to demystify the math behind most modern cryptography, as well as finding historical examples of cryptography's often crucial role in world events. The only reason this book gets four stars instead of five is that it outdated... the last 10 years have seen ...more
Filipe Dias
Even if you're only mildly curious about codes, cyphers or privacy, this book is the one to get.
A well crafted and accessible book that portrays some of the highlights of history on Cryptography and the need for secure communications. From early history to the near future, the battles between codemakers and code-breakers are hidden from sight but they're the cornerstone of any revolution and essential to commerce and wars.
Now more than ever, the concept of Privacy is defined by our understanding
Can't say I followed everything in this book but I comprehended enough to enjoy it immensely. The secret codes used in early Western History (substitution and frequency codes) are easy to understand i.e. Mary Queen of Scots secret messages were fairly simple and it's a wonder she wasn't beheaded earlier. The Enigma machine and quantum cryptography made me dizzy. The author includes "fun exercises" in the back of his book. I skipped them. My brain is too out of shape. I mainly read this for the h ...more
The book takes the reader from something as simple as the mono alphabet substitution cipher to making him/her relatively comfortable with understanding quantum cryptography. What is interesting is that the author has not intimidated the reader with jargon and technicalities, but has kept the book true to its name, popular science. A must read for everyone, especially to understand what it means to live in the information age and why cryptography is the daily bread of our communication systems.
Jesse Voet
Well written book, which gives a short summarised history of cryptography, in a format which is understandable for a broad audience, more than just computer specialists alone. The focus is more on the history and the purpose of cryptography, with some of these techniques explained. It is a bit outdated - written in the 90's, so much happened since, it could use an update. It read easily, and I would recommend it to everyone interested, as an introduction work.
A fantastic mix of cryptography and history -- and good writing! In general, Singh presents the intuition well without assuming the reader has a technical background. This particularly helped for the last chapter dealing with quantum cryptography. Earlier in the book, however, I felt a bit babied (ex. He spent a paragraph explaining the definition of a prime number). Having a stronger technical background, I would've liked something a bit more math-based.
Very fun! A mixture of puzzles (codes), math (very light) and history. It was a pretty easy read that can be done over a period of time.

Most interesting was tying the development of codes to actual historical impacts of codes, ciphers, codebreaking, and cryptology. Perhaps one of the best explanations of Diffie-Hellman and RSA techniques - very understandable!
Vinoth Paramanantham
I'm not a huge fan of cryptography or anything related to codes, puzzles etc yet my attention was spellbound by this fascinating book. Simon Singh does a good job on introducing a vast and baffling field of cryptography to naive readers like me with ease. I thoroughly enjoyed this book and suggest this to anyone who likes codes, crypts and puzzle.
great read.

nice history lesson. parts are math heavy, but i have been told by my students that these sections can be skipped/skimmed (the horror) without losing any of the history . .

i get to lead a discussion of this book with a bunch of college age students later today . . .
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Interesting book 3 33 Jan 25, 2015 06:08AM  
an eye-opener... 3 64 Sep 06, 2011 08:25PM  
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Simon Lehna Singh, MBE (born 1 January 1964) is a British author who has specialised in writing about mathematical and scientific topics in an accessible manner. He is the maiden winner of the Lilavati Award.

His written works include Fermat's Last Theorem (in the United States titled Fermat's Enigma: The Epic Quest to Solve the World's Greatest Mathematical Problem), The Code Book (about cryptogra
More about Simon Singh...

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“if N is large enough, it is virtually impossible to deduce p and q from N, and this is perhaps the most beautiful and elegant aspect of the RSA asymmetric cipher.” 2 likes
“Even the Vatican, probably the second most active center of cryptanalysis, would send Soro seemingly impenetrable messages that had fallen into its hands. In 1526, Pope Clement VII sent him two encrypted messages, and both were returned having been successfully cryptanalyzed.” 0 likes
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