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Crypto 101 – Introductory course on cryptography

www.crypto101.io Books & learning Books & long-form works Security & privacy Class of 2016-12 Hall of Fame
Screenshot of www.crypto101.io captured 2026-07-20
Page preview · captured 2026-07-20

Resurfaced independently across 8 calendar years, with breakout response in 4 of them.

submissions
12
submitters
12
observed span
2014–2025
peak thread · 140 comments
919 pts
latest 20+ return · 2025-07-06
236 pts

Submission timeline

2007–2026

One slot for every year since HN launched. Height is that year's peak points; orange marks a 100+ point or 50+ comment breakout. Select a bar to open its strongest thread.

First comments on top threads

HN comment order

This is about to eat my weekend, I think! :) Quite seriously, this is exactly what the tech world needs - personally, I know that in terms of understanding of crypto I'm streets ahead of the average Joe, but orders of magnitude behind people who actually know the field. I'm certain I'm far from alone in that set, but the way the world's going means that we with the generalised technical know-how have a moral impetus to bring the rest…

+1 for the fact that the "get book" button on linked site just downloads the pdf.

This is a preview release of Crypto 101, an introductory course on cryptography. It's a follow-up to a talk I gave last year at PyCon. To paraphrase David Reid, abstinence-only crypto education isn't working. We need easily accessible crypto education for developers. This book, and, once they're done, the included exercises, hopes to help. I will happily answer all your questions here, by e-mail (see profile) or on twitter (@lvh). In case the website breaks down, here's the direct download…

lvh·352-point thread·

Thanks for the link. You can download this entire Handbook of Applied Cryptography for free [1]. Recently the authors also provided online course and video namely: - Cryptography 101: Building Blocks (fundamental cryptographic primitives) [2] - Cryptography 101: Real-World Deployments (PKI, TLS, Bluetooth, AWS, Signal) [3] Other courses and video includes: - The Mathematics of Lattice-Based Cryptography (introductory course) - Kyber and Dilithium (standardized lattice-based cryptosystems) - Hash-based signature…

The first top-level comment from each of the four biggest threads, in HN’s own order. Excerpts are shortened; open a comment for full context.

Breakout years
4

100+ points or 50+ comments

Total points
2230

reference only — not used in Hall rules or ranking

Total comments
343

reference only — not used in Hall rules or ranking

Every submission

DateTitle as submittedByPointsComments
2014-03-19Crypto 101First breakouttptacek35286
2014-11-03Crypto 101ianes15426
2015-06-15Crypto 101 (free ebook, new release)lvh369
2016-06-03Crypto 101adamnemecek40
2016-12-02Crypto 101 – Introductory course on cryptographyHall induction · Best threadzerognowl919140
2018-05-02Crypto 101rayascott20
2018-12-28Crypto 101 – Introductory course on cryptographyfebin51467
2020-04-14Crypto 101 is an introductory course on cryptography available for programmersJoachimS40
2020-07-26Crypto 101makeworld20
2021-09-10Crypto 101 is an introductory course on cryptographyaxiomdata31630
2023-05-23Crypto 101 – Introductory course on cryptographyanderspitman40
2025-07-06Crypto 101 – Introductory course on cryptography (2017)Latest 20+ point returnpona-a23615