Code Girls: The Untold Story of the American Women Code Breakers of World War II (2024)

Book written byLiza Mundy

Book review byLarry Pesce

Bottom Line

I recommend this nonfiction book for the Cybersecurity Canon Hall of Fame.

Executive Summary

Code Girls is the story of Dot Brayden, Carolyn Ruth, Wilma Berryman and a whole host of other women recruited into the Army Signal Intelligence Service at Arlington Hall. Compiled from interviews, research, and personal letters, Code Girls documents the struggles and accomplishments of the women codebreakers of WWII. The personal accounts of these women “Code Girls” illustrate both the technical and social challenges of women in the workforce in the 1940’s, but exemplifies the amazing mathematical and technical aptitudes and pure grit they displayed, ultimately making them as important (if not more so) than the soldiers on the front lines to the war effort, through the breaking of several Japanese cryptography systems.

Review

Originally, I set out to listen to this book in audio format with my wife and two daughters as an inspiration for our family, that as a woman, anything is possible. As the subject of the book implies, this includes being an absolutely essential figure in a world changing event: becoming the driving force that broke many of the cryptographic methods employed during WWII. Certainly, my kids were inspired by all of the “Code Girls” that Mundy interviewed for this book for their tenacity and critical thinking! They both noted that we’ve grown a lot from the past and even have some more growing to do on securing a diverse workplace.

From my perspective as a cyber security professional, hearing some of the technical details and hard work put in by the women in how they went about breaking the cryptographic functions was fascinating. After hearing how deduction, intuition, pattern recognition, the use of crib books of pre-discovered phrases, plaintext and key reuse, to inverse induction attacks, it really helped solidify some of the more modern equivalent concepts in my mind. The history behind how they performed these actions as both a mental exercise and with limited computing power made me realize that we’re still doing the same technical feats, just a heck of a lot faster!

The personal experiences of the women working in Arlington Hall made this book an incredibly enjoyable read, despite it being about some of the darkest times of the 20th century. I enjoyed learning about the living and work conditions, their personal tales, and how they came to be codebreakers; It was amazing to see folks from very diverse backgrounds come together to become such great friends and an unstoppable force.

Conclusion

Over the years I’ve become fond of Winston Churchill’s quote “Those that fail to learn from history are doomed to repeat it.” Mundy’s recounting of the Code Girls activity, the struggles that they faced (socially, in the workplace, and breaking code) all hold some lessons from history. By learning from this history, hopefully we can improve for the future, both as a society, and implementers (and breakers) of cryptography. Due to these lessons, I feel that this is an important book and one worthy of the Cybersecurity Canon.

We modeled theCybersecurity Canonafter the Baseball Hall of Fame and the Rock & Roll Hall of Fame, except it’s a canon for cybersecurity books. We have more than 25 books on the initial candidate list, but we are soliciting help from the cybersecurity community to increase the number.Please write a review and nominate your favorite.

The Cybersecurity Canon is a real thing for our community. We have designed it so that you candirectly participate in the process. Please do so!

Code Girls: The Untold Story of the American Women Code Breakers of World War II (2024)

FAQs

Is code girls based on a true story? ›

The Code Girls or World War II Code Girls is a nickname for the more than 10,000 women who served as cryptographers (code makers) and cryptanalysts (code breakers) for the United States Military during World War II, working in secrecy to break German and Japanese codes.

What is the summary of code girls? ›

Code Girls is the story of Dot Brayden, Carolyn Ruth, Wilma Berryman and a whole host of other women recruited into the Army Signal Intelligence Service at Arlington Hall. Compiled from interviews, research, and personal letters, Code Girls documents the struggles and accomplishments of the women codebreakers of WWII.

What two questions were the women being recruited as codebreakers asked? ›

“This was an important watershed for women joining the military,” Mundy said. During the interview process, they would be asked just two questions: do you like crossword puzzles and are you engaged to be married.

What did code breakers do in WWII? ›

A codebreaker operates a U.S. Navy cryptanalytic machine to help decode enemy messages during World War II.

Why were code girls such an important group during World War II? ›

These women continually broke the ever-changing and increasingly complex systems used by the Axis Powers to shroud their messages in secrecy, providing vital intelligence to the U.S. Army and Navy that allowed them to not only keep many American troops out of harm's way but ensure the country emerged from war ...

Was Code Girls made into a movie? ›

Code Girls (TV Movie) - IMDb.

What is the movie about the female Codebreakers? ›

Set in 1952, "The Bletchley Circle" tells of four women who have returned to normal lives after working at Bletchley Park -- the site where the Germans' infamous "enigma cypher" was broken by British mathematicians and code breakers during World War II.

What is the woman who smashed codes about? ›

The Woman Who Smashed Codes is the story of Elizebeth Friedman, the mother of modern cryptoanalysis and cryptography. Elizebeth's accomplishments were forgotten in part because she was the loving wife of William Friedman, a brilliant cryptanalyst in his own right.

What is the woman code Sophia Nelson about? ›

Book overview. A powerful, no-nonsense guide for women that provides them the keys to unlock a fulfilling life. Every woman lives by a code, whether she realizes it or not. It informs how she treats others and herself, how much she expects of herself, and how far she is willing to go in order to find success.

Was Enigma really cracked? ›

With the help of captured Enigma material, and Turing's work in developing a technique he called 'Banburismus', the naval Enigma messages were able to be read from 1941.

Who broke the Enigma code first? ›

The Enigma code was first broken by the Poles, under the leadership of mathematician Marian Rejewski, in the early 1930s. In 1939, with the growing likelihood of a German invasion, the Poles turned their information over to the British, who set up a secret code-breaking group known as Ultra, under mathematician Alan M.

Who were the Native American code breakers in ww2? ›

Consequently, in 1940 and 1941, the army recruited Comanche, Meskwaki, Chippewa, and Oneida language speakers to train as code talkers; they later added eight Hopi speakers. In April 1942, the Marine Corps trained twenty-nine Navajo men in combat and radio communications.

What actress was a code breaker in ww2? ›

Hedy Lamarr
BornHedwig Eva Maria KieslerNovember 9, 1914 Vienna, Austria-Hungary
DiedJanuary 19, 2000 (aged 85) Casselberry, Florida, U.S.
CitizenshipAustria (until 1938) Stateless (1938–1953) United States (from 1953)
OccupationsActress inventor
3 more rows

What was the secret code in World War 2? ›

Intelligence from decrypted Enigma messages, code-named "ULTRA," was extremely secret, and very few people knew about it. While the Germans never found out the Allies could solve their codes, they suspected it as their ability to sink Allied shipping slipped dramatically in 1942.

What code was never broken in ww2? ›

The Navajo Code Was Never Broken

Despite the thousands of messages that Code Talkers sent during WWII, their code was never broken by the Japanese or the Germans, who were very good at decryption.

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