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THE VIDEO SHELF · enigma cryptanalysis

Flaw in the Enigma Code - Numberphile

Numberphile's Dr James Grime explains the flaw in the Enigma machine, namely that a letter could never be encrypted to itself, and how that helped the Allies break the code. It touches on the Bombe and Alan Turing.

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Why HN readers recommended it

HN points to it as a short, clear explanation of why Enigma was breakable and how search-space elimination works.

This is a summary from the source dataset, not an endorsement by Hacker News or the video creator.

Video & recommendation details

Creator / channel
Numberphile
Topic
enigma cryptanalysis
Format
explainer
Level
general
HN recommenders in dataset
4
HN mentions in dataset
4
Recommendation years in dataset
2013–2025

These counts and years describe the included Hacker News records; they are not YouTube views or the video’s publication date.

From the original HN conversations

Excerpts from the recorded comments. Follow each source for the full comment and surrounding discussion.

  • Some people might like this from Numberphile which describes the flaw in the enigma machine that British code breakers used to eventually break the code. [VIDEO]

    sproketboy on Hacker News · 2013-01
    In The Enigma Machine: How Alan Turing Helped Break the Unbreakable Nazi Code

  • In this case, a more relevant example from World War II might be the exploitation of flaws in the Enigma machine, namely: 1) the re-use of common phrases in weather reports, and 2) the fact that a letter could not be encoded as itself in …

    iClaudiusX on Hacker News · 2017-09
    In Forthcoming book seeks to visualise, locate and expose many numbers stations

  • none of it is "brute force", GNFS is a process that rapidly excludes numbers from the search space that cannot be the answer, in principle similar to the way they broke enigma. numberphile has a great video on that one [VIDEO] Also, taking the OP …

    DarkmSparks on Hacker News · 2025-01
    In Cracking a 512-bit DKIM key for less than $8 in the cloud

Summaries, classifications and recommendation records are from the HackerTube source dataset. Read about this library and its limitations.

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