Where to start? Hackerrank Cryptanalyst Interview

Hey all,

I have experience with web application development with various programming languages like Java, JavaScript, Python, C#. I'm good with Data Structures and Algorithm as well. But recently I have received a Cryptanalyst job interview and I have no idea how to prepare for it since I haven't taken any cryptography courses in my University! The interview will be in Hackerrank. If anybody has done interview in Hackerrank for Cryptanalyst roles it will be really helpful if you share your experience. In general, I'm pretty lost in terms of where to start, and how to prepare for this interview, so I will really appreciate it if you guys good share some good resources to prepare for this interview.

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πŸ“…︎ Feb 01 2021
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The Story of America's Underappreciated β€˜First Female Cryptanalyst’ time.com/5928583/elizebet…
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[todayilearned] TIL Elizebeth Smith Friedman, America’s first female cryptanalyst, worked as a code breaker who successfully broke up a Nazi spy ring across South America during the 1940s. FBI Director J. Edgar Hoover took credit for her work until reports were declassified in 2008. smithsonianmag.com/smart-…
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The Codebreaker (2020) - The story of Elizebeth Friedman, the groundbreaking cryptanalyst who brought down a Nazi spy ring [00:52:49] pbs.org/video/the-codebre…
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TIL Elizebeth Smith Friedman, America’s first female cryptanalyst, worked as a code breaker who successfully broke up a Nazi spy ring across South America during the 1940s. FBI Director J. Edgar Hoover took credit for her work until reports were declassified in 2008. reddit.com/r/todayilearne…
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[todayilearned] TIL cryptanalyst Elizebeth Friedman broke 4,000 codes during WWII and brought down a Nazi spy ring by cracking an early version of the Enigma machine with pen and paper pbs.org/wgbh/americanexpe…
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πŸ“…︎ Jan 21 2021
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[todayilearned] TIL Elizebeth Smith Friedman, America’s first female cryptanalyst, worked as a code breaker who successfully broke up a Nazi spy ring across South America during the 1940s. FBI Director J. Edgar Hoover took credit for her work until reports were declassified in 2008. smithsonianmag.com/smart-…
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TIL Babington Plot was a plan to assassinate Queen Elizabeth I and put Mary, Queen of Scots, on the throne. Elizabeth's spymaster Francis Walsingham who discovered the plan, planted double agents and cryptanalyst to it. Intercepted letters showed Mary's sanction to the plot, leading to her execution en.wikipedia.org/wiki/Bab…
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πŸ“…︎ Oct 22 2020
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After a year of decoding work, British cryptanalysts at Bletchley Park have broken German "Shark" naval cipher- vital for tracking Kriegsmarine U-boats in the Battle of Atlantic.

^- ^Live ^tweets ^from ^1942 ^(@RealTimeWWII) ^| ^December ^14, ^2020

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πŸ“…︎ Dec 14 2020
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British cryptanalysts do not realise significance of report: telegram refers to β€œspecial treatment”, not killing, & lists death camps only by initial: L (Lublin), B (BeΕ‚ΕΌec), S (Sobibor), T (Treblinka). Evidence of genocide of the Jews of Poland is filed in secret UK archives.

^- ^Live ^tweets ^from ^1943 ^(@RealTimeWWII) ^| ^January ^21, ^2021

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πŸ“…︎ Jan 21 2021
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Spycast - NSA linguist and cryptanalyst Tom Glenn on SIGINT in the Vietnam War [37min] podcasts.google.com/?feed…
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πŸ“…︎ Nov 12 2020
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Spycast - NSA linguist and cryptanalyst Tom Glenn on SIGINT in the Vietnam War [37min] podcasts.google.com/?feed…
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Les Chiffres Secrets DΓ©voilΓ©s (The Secret Numbers Unveiled ) is considered a landmark in cryptographic literature by Γ‰tienne Bazeries (1846-1931), a French military cryptanalyst best known for developing the "Bazeries Cylinder", an improved version of Thomas Jefferson's cipher cylinder
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23 Jul 1884: Dilly Knox, future cryptanalyst was born ww2db.com/person_bio.php?…
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20 Jul 1976: Joseph Rochefort, former US Navy cryptanalyst, passed away ww2db.com/person_bio.php?…
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Ludwig FΓΆppl: A Bavarian Cryptanalyst on the Western Front academia.edu/12192169/Lud…
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On This Day β€” Remembering Navy Cryptanalyst Agnes Meyer Driscoll (July 24, 1889 – September 16, 1971) gosint.wordpress.com/2020…
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How can I bolster my resume for a career as a cryptanalyst?

I'm in the first year of my M.Sc. in pure math, doing arithmetic geometry. While I'm en route towards a Ph.D., I'm also considering leaving once I've finished my masters to work in cryptanalysis, most likely for CSIS, (Canada's CIA). I have some basic python/Sage skills, I have taken a course called "Applied Algebra" where are large focus was on elementary cryptography (RSA, Diffe-Hellman etc.), and I've taken a number of graduate courses in a variety of courses, favoring algebra.
What can I do over the next year and a half to make myself an ideal candidate for a job in cryptanalysis, or CSIS in particular? If you could offer some more specific advice and/or resources than "git gud at python" I'd appreciate it. I imagine an ideal answer would include something like recommended textbook reading list or trusted online courses/certifications, or even a concise list of particular things I should be able to do with a computer.

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πŸ“…︎ Jan 03 2020
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Forgetting Elizebeth Friedman: How America’s Greatest Cryptanalyst Lay Unnoticed For A Half Century womenyoushouldknow.net/el…
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πŸ“…︎ Sep 25 2019
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18 Nov 1941: US Navy cryptanalysts concluded Japanese carriers remained in Japanese waters. ww2db.com/battle_spec.php…
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πŸ“…︎ Nov 18 2019
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TIL Cicada 3301 is an anonymous organization that on three occasions has posted a set of complex puzzles to recruit capable cryptanalysts from the public. It has been called "the most elaborate and mysterious puzzle of the internet age". en.wikipedia.org/wiki/Cic…
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πŸ“…︎ May 22 2014
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William Weisband, Sr. (August 28, 1908 – May 14, 1967) was an Ukrainian-American cryptanalyst and NKVD agent (code name LINK), best known for his role in revealing U.S. decryptions of Soviet diplomatic and intelligence codes (Venona Project) to Soviet intelligence
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πŸ“…︎ May 05 2019
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[US] The Imitation Game (2014) During World War II, a gay mathematician leads a team of cryptanalysts as they work feverishly to break the Germans' notorious Enigma code. netflix.com/title/7029517…
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πŸ“…︎ Feb 14 2018
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Fun fact: the Ferengi have been the best cryptanalysts in the Alpha Quadrant since they heard about Bitcoin
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πŸ“…︎ Aug 04 2019
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20 Jul 1976: Joseph Rochefort, former US Navy cryptanalyst, passed away ww2db.com/person_bio.php?…
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πŸ“…︎ Jul 21 2019
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British codebreakers, based at Bletchley Park, are desperate for a "pinch" of German codes to help their work. Alan Turing & other cryptanalysts are "like undertakers cheated of a nice corpse."

^- ^WW2 ^Tweets ^from ^1940 ^(@RealTimeWWII) ^| ^October ^20, ^2018

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πŸ“…︎ Oct 20 2018
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TIL the Polish cryptanalysts who broke the Enigma relocated to Southern France after the Nazi invasion, where they continued cracking Axis codes under the noses of the Vichy authorities until 1942 en.wikipedia.org/wiki/Cad…
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πŸ“…︎ Apr 22 2017
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On This Day β€” Remembering Navy Cryptanalyst Agnes Meyer Driscoll (July 24, 1889 – September 16, 1971) gosint.wordpress.com/2019…
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πŸ“…︎ Jul 25 2019
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Our FBI Cryptanalyst solved this in 4 hours. Can you crack the code?

We’ve launched a project today on β€œunnamed crowdfunding platform” and just wanted to give everyone the head’s up that for the first time ever, we’ve hidden a pretty tough code on the page that’s been inspired by the real-life work of one FBI examiner we know who cracked it in 4 hours.

All cryptanalysts, arm chair detectives and generally inquisitive people unite to #crackitandbackit. We'd love to hear from you on Twitter to see what you think the answer is.

case.forensicoutreach.com

Good luck!

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πŸ“…︎ Feb 19 2015
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20 Jul 1976: Joseph Rochefort, former US Navy cryptanalyst, passed away ww2db.com/person_bio.php?…
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πŸ“…︎ Jul 21 2018
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WW2 original Polish Enigma cryptanalyst Henryk Zygalski military identity card, 1947.
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