The most recommended cryptanalysis books

Who picked these books? Meet our 11 experts.

11 authors created a book list connected to cryptanalysis, and here are their favorite cryptanalysis books.
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Battle of Wits

By Stephen Budiansky,

Book cover of Battle of Wits: The Complete Story of Codebreaking in World War II

Mark Ciampa Author Of Security Awareness: Applying Practical Security in Your World

From the list on how to break things (encryption, passwords, etc.).

Who am I?

I have had the opportunity to write (I have written over 30 college textbooks on technology, most of them in the area of cybersecurity), study (my PhD dissertation was on cybersecurity), teach (I have taught at colleges and universities my entire career about technology, networking, and cybersecurity), and research (I have published numerous peer-reviewed journal articles) on the topic of cybersecurity. But I have always had a soft spot in my heart for the average computer user who struggles with how to protect their technology devices. This has helped drive my passion to focus on practical cybersecurity for everyone.

Mark's book list on how to break things (encryption, passwords, etc.)

Why did Mark love this book?

It is hard to underestimate the significance of code breaking during World War II. Without the work of dedicated mathematicians, linguists, and others the great conflicts such as the Battle of Midway and the German U-boat "wolfpacks" that sank over 13 million tons of Allied supplies could have easily been up for grabs. But due to the codebreakers the balance shifted to the Allies. And what is even equally impressive is that the Axis powers never knew that their encoded messages were being read. Stephen Budiansky traces how the codebreakers pulled off this feat while at the same time often battling within their own ranks about who should decode the message, how the messages should be used, and who should get the credit.

By Stephen Budiansky,

Why should I read it?

2 authors picked Battle of Wits as one of their favorite books, and they share why you should read it.

What is this book about?

Drawing from newly declassified documents, the author chronicles the story of codebreaking during the last world war, from cat-and-mouse games with Nazi U-boats to the invasion of Normandy.


The Rose Code

By Kate Quinn,

Book cover of The Rose Code

Elisabeth M. Lee Author Of Young PRB: A Novel of the Pre-Raphaelite Brotherhood

From Elisabeth's 3 favorite reads in 2023.

Who am I?

Author Artist History maniac World traveler Music addict

Elisabeth's 3 favorite reads in 2023

Why did Elisabeth love this book?

This book was an escapist read for me after many heavy non-fiction tomes, but it was as detailed in facts as any history book.

I was easily swept into the story of three intelligent women working as code breakers at Bletchley Park, England, during World War II.

The three friends, Osla, Beth, and Mab, are not always fair to each other or themselves, but their work and the need to keep it secret binds them together, and an added mystery to solve that eventually breaks the group apart.

Based on actual events and people, it was hard to put down as the characters and the history were so fascinating. I listened to the audiobook, and Saskia Maarleveld was an excellent narrator.

By Kate Quinn,

Why should I read it?

6 authors picked The Rose Code as one of their favorite books, and they share why you should read it.

What is this book about?

The New York Times and USA Today bestselling author of The Huntress and The Alice Network returns with another heart-stopping World War II story of three female code breakers at Bletchley Park and the spy they must root out after the war is over.

1940. As England prepares to fight the Nazis, three very different women answer the call to mysterious country estate Bletchley Park, where the best minds in Britain train to break German military codes. Vivacious debutante Osla is the girl who has everything-beauty, wealth, and the dashing Prince Philip of Greece sending her roses-but she burns to…


The Girl from Bletchley Park

By Kathleen McGurl,

Book cover of The Girl from Bletchley Park

Gill Thompson Author Of The Child on Platform One

From the list on World War Two featuring strong women.

Who am I?

As a teacher, I spent forty years at the chalkface before finally achieving my ambition to be a published writer. My first novel was about a child migrant to Australia; my second about a little girl on the kinder transport. I wanted to write about strong women in world war two. All three of the mothers in my stories are separated from their children and have to make some tough decisions. I hope my readers will remember them for their courage and tenacity and that they’ll enjoy reading about them as much as I’ve enjoyed creating them. 

Gill's book list on World War Two featuring strong women

Why did Gill love this book?

I’m fascinated by the way the code breakers at Bletchley helped to shorten the war. In Pam, McGurl has created a strong woman, who makes key choices, sometimes at the expense of her own happiness, to support the war effort. But what I really enjoyed was the time slip nature of the novel, where Pam is contrasted to her granddaughter Julia, a modern woman, who, when let down by the men around her, becomes empowered by her own freedom. It’s interesting to see how women’s roles have changed between the 1940s and today. 

By Kathleen McGurl,

Why should I read it?

1 author picked The Girl from Bletchley Park as one of their favorite books, and they share why you should read it.

What is this book about?

The latest unforgettable timeslip novel from the USA Today bestselling author of The Secret of the Chateau.

Will love lead her to a devastating choice?

1942. Three years into the war, Pam turns down her hard-won place at Oxford University to become a codebreaker at Bletchley Park. There, she meets two young men, both keen to impress her, and Pam finds herself falling hard for one of them. But as the country's future becomes more uncertain by the day, a tragic turn of events casts doubt on her choice - and Pam's loyalty is pushed to its limits...

Present day.…


The Bletchley Park Codebreakers

By Ralph Erskine, Michael Smith,

Book cover of The Bletchley Park Codebreakers

Mark Baldwin

From the list on the Enigma Machine and Bletchley Park.

Who am I?

Dr. Mark Baldwin – aka Dr. Enigma – is a world expert and speaker on the Enigma machine and has delivered over 700 presentations and demonstrations (using his own, genuine wartime Enigma machine) to some 70,000 people around the world. He has spoken to a wide range of audiences, from cybersecurity experts and software developers at leading Silicon Valley tech companies such as Facebook, Dropbox, and PayPal, to academic audiences at universities, executives at business conferences, and the general public in a couple of hundred one-man theatre shows.

Mark's book list on the Enigma Machine and Bletchley Park

Why did Mark love this book?

This anthology is a valuable complement to my first book, with a couple of dozen contributors: a mixture of some who worked at Bletchley Park during the war, and some who are professional historians. The passage of time has encouraged archival research, and allowed historical analysis, producing an authoritative account of Bletchley’s achievements, particularly the breaking of millions of Enigma-enciphered messages.

By Ralph Erskine, Michael Smith,

Why should I read it?

1 author picked The Bletchley Park Codebreakers as one of their favorite books, and they share why you should read it.

What is this book about?

The British codebreakers at Bletchley Park are now believed to have shortened the duration of the Second World War by up to two years. During the dark days of 1941, as Britain stood almost alone against the the Nazis, this remarkable achievement seemed impossible. This extraordinary book, originally published as Action This Day, includes descriptions by some of Britain's foremost historians of the work of Bletchley Park, from the breaking ofEnigma and other wartime codes to the invention of modern computing, and its influence on Cold War codebreaking. Crucially, it features personal reminiscences and very human stories of wartime codebreaking…


The Codebreakers

By David Kahn,

Book cover of The Codebreakers: The Story Of Secret Writing

Nicholas Reynolds Author Of Need to Know: World War II and the Rise of American Intelligence

From the list on citizen spies building American intelligence in WWII.

Who am I?

The defining event in my parents’ lives, World War II has always been in my blood. When I was growing up, it would surface now and again when old comrades came to visit or when we came across souvenirs from the war. My favorite was a carefully etched German map showing sea lanes in the Caribbean, exotic and somehow menacing at the same time. My curiosity piqued, I knew I wanted to be in the thick of history—which meant reading and writing about the war, getting my PhD in history, and becoming a Marine and an intelligence officer.  

Nicholas' book list on citizen spies building American intelligence in WWII

Why did Nicholas love this book?

David was a pioneer. Before Codebreakers there was next to nothing in print about codebreaking. Focused on World War II, he introduced a generation of readers to a secret realm, inviting us to look behind the big green door for the first time. This generous and loyal friend alerted me to the need for comprehensive overview of American intelligence in World War II.

By David Kahn,

Why should I read it?

2 authors picked The Codebreakers as one of their favorite books, and they share why you should read it.

What is this book about?

Codebreaking is the most important form of secret intelligence in the world. It produces much more and more trustworthy information than spies, and this intelligence exerts great influences upon the policies of governments.


Combined Fleet Decoded

By John Prados,

Book cover of Combined Fleet Decoded: The Secret History of American Intelligence and the Japanese Navy in World War II

Robbyn Swan Author Of A Matter of Honor: Pearl Harbor: Betrayal, Blame and a Family’s Quest For Justice

From the list on American code-breaking in World War II.

Who are we?

Anthony Summers and I are the authors of several books that focus on the world of intelligence, including The Eleventh Day: The Full Story of 9/11 and Osama bin Laden- which was a Finalist for the Pulitzer Prize. As we revealed in our most recent book, A Matter of Honor, U.S. code-breaking efforts in World War II began with a colossal failure – Pearl Harbor. According to the first official report on the disaster, the attack “had been clearly foreshadowed” in the Japanese diplomatic traffic the U.S had decoded. The story of how the Americans turned that initial failure into success came to fascinate me.

Robbyn's book list on American code-breaking in World War II

Why did Robbyn love this book?

A groundbreaking work of research that is at the same time a page-turning read that sheds new light on the epic battles of the conflict. Prados interweaves the intelligence successes and failures of the U.S. and Japanese combatants in a way that has not previously been attempted. The resulting work adds hugely to our understanding of the war in the Pacific.

By John Prados,

Why should I read it?

1 author picked Combined Fleet Decoded as one of their favorite books, and they share why you should read it.

What is this book about?

The most authoritative and revealing examination yet of the way intelligence--of all kinds--was instrumental in defeating Japan. Prados gives a new picture of the war in the Pacific, one which will challenge many previous conceptions about that conflict, and one which will be irresistible to those readers who find histories of that period fascinating. 16 pages of photos.


Code Girls

By Liza Mundy,

Book cover of Code Girls: The Untold Story of the American Women Code Breakers of World War II

Robbyn Swan Author Of A Matter of Honor: Pearl Harbor: Betrayal, Blame and a Family’s Quest For Justice

From the list on American code-breaking in World War II.

Who are we?

Anthony Summers and I are the authors of several books that focus on the world of intelligence, including The Eleventh Day: The Full Story of 9/11 and Osama bin Laden- which was a Finalist for the Pulitzer Prize. As we revealed in our most recent book, A Matter of Honor, U.S. code-breaking efforts in World War II began with a colossal failure – Pearl Harbor. According to the first official report on the disaster, the attack “had been clearly foreshadowed” in the Japanese diplomatic traffic the U.S had decoded. The story of how the Americans turned that initial failure into success came to fascinate me.

Robbyn's book list on American code-breaking in World War II

Why did Robbyn love this book?

Mundy’s unputdownable book tells the story of the women behind some of the most significant code-breaking triumphs of the war. The work of women like Elizabeth Friedman – who got her start unpicking the codes of Prohibition-era liquor smugglers – was one of the war’s best-kept secrets.

By Liza Mundy,

Why should I read it?

2 authors picked Code Girls as one of their favorite books, and they share why you should read it.

What is this book about?

An expert on East European politics and economics analyzes and evaluates Western policies toward the new East European democracies as they struggle to build stable political orders and functioning market economies. He argues that the West must give higher priority to assisting the region and reorient its strategies so as to emphasize the political and administrative dimensions of economic reconstruction. He reviews the economic legacy of past Western policies and of Eastern Europe's previous dependency on the Soviet Union, and then examines in detail the changing East-West trade patterns, the prospect for Western investment and technology transfer, the questions of…


Book cover of Spies, Code Breakers, and Secret Agents: A World War II Book for Kids

Barbara Ann Mojica Author Of Little Miss History Travels to Mount Vernon

From the list on for all ages to enjoy.

Who am I?

As a parent, grandparent, retired educator, historian, and children’s book author, I am an avid reader and advocate for children’s literacy. My forty years of experience working with children and their families gives me the background and expertise to identify high-quality books and the types of subjects that children will want to read and adults in the family will enjoy sharing with them.

Barbara's book list on for all ages to enjoy

Why did Barbara love this book?

Carole P. Roman has hit a home run with this nonfiction book. It paints an intriguing picture of the life of spies during World War II. Roman details the training, weapons, and tools used in spy craft. I found the chapters featuring biographical portraits fascinating. Chef Julia Child and author Graham Greene operated undercover. Roman discusses double agents and the Native Americans who broke the Japanese code. I would recommend this book to children who love adventure, espionage, and history. It’s a perfect read for middle-grade students, but an eye-opener for adults as well.

By Carole P. Roman,

Why should I read it?

1 author picked Spies, Code Breakers, and Secret Agents as one of their favorite books, and they share why you should read it.

What is this book about?

Uncover the secret agents of World War 2—an exciting history book for kids 8 to 12

Discover World War 2’s hidden heroes and villains. Spies, Code Breakers, and Secret Agents explores the intriguing world of spycraft and shows you what goes on behind the scenes in war.

From spy schools and ciphers to sneaky tools and secret armies, this guide takes you on a declassified tour of the undercover operations that helped decide the outcome of World War 2. There’s also more than a dozen short spy-ographies that cover some of the most famous (and infamous!) agents that were active…