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Cryptography: videos Hacker News recommends
Cryptography: encryption, public key, RSA, elliptic curves, TLS, hashing, zero-knowledge proofs, Bitcoin, blockchain, cryptocurrency, passwords, history of codes and ciphers, Enigma. Below: every video in this topic that at least three HN users linked with real commentary, in at least three different months (28 talks, 23 explainers, 6 commentarys), best-scored first, with the comments on each video page.
- 9 HN recommenders 11 months 2016–2026HN repeatedly recommends it as the deepest public look at how iCloud Keychain and Apple's device and cloud security are designed.
- 11 HN recommenders 11 months 2020–2026HN treats it as the go-to layperson-friendly argument against e-voting and links it in nearly every voting-technology thread.
- 15 HN recommenders 11 months 2017–2024The go-to recommended video for newcomers wanting a clear, visual explanation of how Bitcoin and blockchains work.
- 9 HN recommenders 8 months 2016–2024A Art of the Problem · explainerIt is the go-to beginner explanation of Diffie-Hellman, recommended because the paint analogy makes the idea click without prior cryptography knowledge.
- 9 HN recommenders 7 months 2011–2017HN commenters repeatedly recommend it as the best explanation of why the CA system is broken and what alternatives exist.
- 8 HN recommenders 8 months 2018–2023H HBS Digital Initiative · lectureA staple HN recommendation in crypto and Web3 threads as an entertaining, compelling case against blockchain.
- 12 HN recommenders 6 months 2022–2026It is the go-to long-form critique of crypto that HN commenters recommend whenever skeptics ask for a thorough, well-researched takedown.
- 5 HN recommenders 7 months 2011–2019HN keeps pointing to it as a long, fascinating talk on cryptographic, verifiable voting whenever e-voting security comes up.
- 7 HN recommenders 6 months 2015–2025It is the go-to short explainer HN commenters link whenever e-voting, voting machines or online voting come up.
- 6 HN recommenders 5 months 2023–2025Regarded as the definitive takedown of the metaverse hype and the Decentraland ecosystem.
- 6 HN recommenders 5 months 2013–2014Recommended as a great overview of what Bitcoin's protocol can do beyond simple payments, particularly contracts and smart property.
- 6 HN recommenders 5 months 2014–2025J Jason Tubnor · talkFrequently linked as an entertaining and alarming account of OpenSSL code quality and why the fork happened.
- 5 HN recommenders 4 months 2017–2021T TheBitcoinArmy · talkHN commenters call it one of the best, most unbiased explanations of what actually happened to Mt. Gox and its missing coins.
- 5 HN recommenders 5 months 2016–2024HN commenters point to it in election-security threads as an accessible explainer of how a vote can be verifiable but not sellable.
- 4 HN recommenders 4 months 2013–2026HN points to it as the classic overview of why TLS certificate trust is flawed, and it resurfaces whenever CA or HTTPS security comes up.
- 5 HN recommenders 5 months 2021–2026B Barely Sociable · documentaryHN commenters recommend it as a compelling, if not definitive, argument for Adam Back as Satoshi whenever the identity question comes up.
- 7 HN recommenders 4 months 2021–2025HN commenters recommend it as the best single, entertaining overview of Tether's dubious history, and cite it when arguing Tether lacks real USD backing.
- 3 HN recommenders 3 months 2017HN commenters recommend it as a corrective to enterprise blockchain marketing and as an explanation of what makes Bitcoin distinctive.
- 4 HN recommenders 4 months 2013–2025HN points to it as a short, clear explanation of why Enigma was breakable and how search-space elimination works.
- 4 HN recommenders 4 months 2016–2025HN commenters use it as a short, persuasive primer to send to non-technical people in debates over encryption backdoors and decryption legislation.
- 3 HN recommenders 3 months 2017–2025A Anders Brownworth · tutorialHN repeatedly recommends it as the best ground-up, non-hype introduction for people who want to understand what a blockchain actually is.
- 3 HN recommenders 3 months 2022–2026It is the go-to accessible explanation of zero-knowledge proofs, linked whenever a thread needs an intuitive introduction.
- 3 HN recommenders 3 months 2020–2021HN recommends it as a fascinating conversation showing how the Ethereum founder thinks.
- 3 HN recommenders 3 months 2014–2018T TheSecurityTube · talkHN recommends it as an entertaining talk and the original source on the stripping attack that motivated HSTS.
- 2 HN recommenders 3 months 2020–2023HN uses it as the go-to illustration of just how large 2^256 is.
- 5 HN recommenders 3 months 2021–2022S Swan Bitcoin · documentaryBitcoin advocates on HN cite it to rebut energy-consumption and waste criticisms, though it is an advocacy piece from a Bitcoin company.
- 3 HN recommenders 3 months 2020–2022L learnmeabitcoin · explainerCommenters call it clear enough to implement the algorithm from, and teachers use it in courses.
- 3 HN recommenders 3 months 2015–2021T Techworld Sverige · talkHN people recommend it as a clear explanation of encrypted messaging challenges and of the thinking behind Signal.
- 3 HN recommenders 3 months 2017–2020I Introduction to Cryptography by Christof Paar · lectureRecommended as a moderately formal, clear introduction to finite fields, useful beyond AES.
- 2 HN recommenders 3 months 2017–2022O OnChain Scaling · talkCited by big-block advocates as evidence that Bitcoin could handle far higher throughput.
- 3 HN recommenders 3 months 2021–2024HN recommends it as a good starting point on practical Enigma cryptanalysis with modern hardware.
- 3 HN recommenders 3 months 2019HN recommends it as a good overview of the NIST candidates and the state of post-quantum crypto.
- 3 HN recommenders 3 months 2019–2023HN commenters point to it as a clear, approachable explanation of Shor's algorithm and what quantum computers actually do.
- 3 HN recommenders 3 months 2021–2024R Rodolfo Díaz · explainerHN commenters link it as a short, favorite explanation of Bitcoin's security and the sustainability of a 51% attack.
- 3 HN recommenders 3 months 2018–2023Recommended as the author's own explanation of the design and security of magic-wormhole.
- 3 HN recommenders 3 months 2014–2022A Andrea Ross · talkRecommended as a funny, fascinating tour of how bad the OpenSSL code was and what cleanup looks like.
- 3 HN recommenders 3 months 2018–2019P PBS Infinite Series · explainerHN recommends it as a clear, worked explanation of Shor's algorithm for building intuition.
- 3 HN recommenders 3 months 2021HN commenters use it in crypto debates as evidence that Bitcoin matters for people in unstable-currency countries.
- 2 HN recommenders 2 months 2017–2025Cited as the talk that introduced Upspin, and called fascinating and really good by commenters.
- 2 HN recommenders 2 months 2020–2023T Troy Hunt · talkCited as a must-watch persuasive case for HTTPS everywhere.
- 2 HN recommenders 2 months 2022–2023J Joe Grand · talkRecommended as a gripping real-world hardware hacking story and a showcase of Joe Grand's skill.
- 3 HN recommenders 2 months 2016–2017H House Committee on the Judiciary · news clipHN users cite it as primary-source testimony, especially for the argument that weakening encryption is security versus security, not privacy versus security.
- 2 HN recommenders 2 months 2022–2023Cited as a thorough statement of the bitcoin-maximalist case, with the host pushing back.
- 2 HN recommenders 2 months 2012–2016A Art of the Problem · explainerRecommended as a simple, non-mathematical way to understand key exchange.
- 2 HN recommenders 2 months 2019–2022Recommended as a rare insider look at Apple's security architecture and the reasoning behind its hardware choices.
- 2 HN recommenders 2 months 2019–2026HN recommends it as the primary source on Sony's ECDSA nonce-reuse blunder and the history of console cracking.
- 2 HN recommenders 2 months 2020–2026Cited in decentralization and federation debates as the key talk on the practical challenges, though some found it defeatist.
- 2 HN recommenders 2 months 2021–2022Recommended as a solid, level-headed academic introduction to blockchain, often noted because Gensler later led the SEC.
- 2 HN recommenders 2 months 2015–2018HN points to it as a good overview of Chip and PIN attacks and the consumer-liability downsides.
- 2 HN recommenders 2 months 2017–2018F Franklyn · explainerCommenters point to it as a short, high-level overview of how Lightning payment channels work.
- 2 HN recommenders 2 months 2019–2020HN recommends it as the video version of the argument that JOSE/JWT is a flawed standard, and as a help in understanding token design choices.
- 2 HN recommenders 2 months 2011–2017W WeUseCoins · explainerHN commenters sent it to newcomers as a short, simple first explanation of Bitcoin.
- 2 HN recommenders 2 months 2016–2022O OpenZFS · talkRecommended whenever ZFS encryption comes up as the authoritative explanation of how it was added and its trade-offs at scale.
- 2 HN recommenders 2 months 2021E Ethereum Foundation · interviewShared in web3 threads as a thoughtful conversation tying Brand's long-view thinking to the decentralization movement.
- 2 HN recommenders 2 months 2018–2021Recommended as the protocol designer's own detailed explanation of SCP.
- 2 HN recommenders 2 months 2017–2018HN recommends it as a clear explanation of self-custody and of why to move coins off exchanges.
- 2 HN recommenders 2 months 2016–2018Cited in encryption policy threads as a funny, accessible primer and for its fake Apple ad.
- 1 HN recommenders 1 months 2021–2022M MC Frontalot - Topic · music videoBrought up in threads on encryption and quantum cracking as a fitting song about future decryption.
- 1 HN recommenders 1 months 2022–2023N Nicholas C Weaver · lectureHN commenters offer it as an expert, skeptical overview of what cryptocurrency actually is and its weaknesses.
- 1 HN recommenders 1 months 2013–2016HN cites it as the best explanation of how Persona's provisioning and login work, and of why it used email addresses as identity.
- 1 HN recommenders 1 months 2017–2024The go-to short explanation whenever lava lamps, entropy sources, or Cloudflare randomness come up.
- 1 HN recommenders 1 months 2011–20151 1KIND Reviews · talkRecommended as a fun, detailed account of how the PS3's security was broken.
- 1 HN recommenders 1 months 2017–2020Cited in discussions of cryptocurrency, KYC/AML and financial surveillance as a framing of money as a tool of control.
- 1 HN recommenders 1 months 2011–2020P pucitp · demoIt is linked as the original short demonstration that keys can be pulled from RAM after shutdown.
- 1 HN recommenders 1 months 2017HN links it as a rare look inside a large Chinese mining operation, with its deafening machine noise and workers' conditions.
- 1 HN recommenders 1 months 2018–2021HN links it as the primary source for Buffett's bitcoin views and his argument about productive versus non-productive assets.
- 1 HN recommenders 1 months 2022–2023F FIDO Alliance · demoHN points to it to explain how passkeys work across ecosystems and are not proprietary.
- 1 HN recommenders 1 months 2018–2019W We Are All Satoshi · commentaryHN commenters cite it, with a pointer to the section from about 10:00, when arguing that Lightning has no solved routing algorithm; most mentions are critical of Lightning.
- 1 HN recommenders 1 months 2023–2026Linked as the approachable explanation whenever HN discusses detecting or watermarking AI-generated text.
- 1 HN recommenders 1 months 2026Cited as an accessible, documentary-style account of the XZ backdoor in supply chain security discussions.
- 1 HN recommenders 1 months 2021–2025HN points to it as an intuitive explanation of how NIST standardized a backdoored generator.
- 1 HN recommenders 1 months 2018–2023A Audie Murphy American Legend · news clipCited as the classic real-world use of Morse code to smuggle out a message under duress.
- cited 4× 0 months 2018–2021HN commenters link it as a defense of Bitcoin's energy use, offered as a rebuttal to claims that mining is wasteful.
- cited 5× 0 months 2018–2025J Jack Larkin · news clipHN cites it as a joke and shorthand when governments try to legislate against encryption or math.
- cited 5× 0 months 2020–2024E Ethereum Foundation · talkHN cites it in Monero and Zcash debates as a critique of decoy-based privacy and its passive and active attacks.
- cited 3× 0 months 2018–2022B Bitcoin Israel · lectureMostly cited in critical or skeptical comments about Buterin, with a little admiration for the talk coming from a 19-year-old.
- cited 10× 0 months 2020–2025HN cites it as precedent for repurposing mining-only GPUs for graphics, in threads about Nvidia limiting mining on gaming cards.
- cited 3× 0 months 2018–2022D Decentralized Thought · commentaryHN mentions are thin and mostly cite it in Lightning Network discussions, as a reference point for that critical viewpoint rather than a recommendation.
- cited 3× 0 months 2013–2014I ICANN · news clipHN cites it to show how seriously root key ceremonies are secured and to let people watch one.
- cited 5× 0 months 2016–2021C CNA Insider · interviewCited, usually critically, as a window into how payment companies view cryptocurrency and cash.
- cited 4× 0 months 2017–2018R Real World Crypto · talkCited in threads about Google's purchase tracking as the technical source for how the matching might work.
Questions
What is the most recommended cryptography video on Hacker News?
Behind the Scenes of iOS Security by Black Hat: HN repeatedly recommends it as the deepest public look at how iCloud Keychain and Apple's device and cloud security are designed.
How is this cryptography list ranked?
By HackerTube's score: the number of distinct months in which an HN comment recommended the video, plus half a point for every month with a strong recommendation. One viral thread counts less than steady recommendations over years.
Where do the videos come from?
From every Hacker News comment between 2007 and 2026 that linked a YouTube video, labeled by an AI model as a recommendation, a citation, a joke or a criticism. The list is published by HackerTube under ODC-By 1.0; this edition adds indexable pages and the comment context.
Video list and Hacker News comment labels from HackerTube (prompted by @karpathy), released under ODC-By 1.0, built on the open-index/hacker-news archive. Hacker News data is provided by Y Combinator; comments remain the work of their authors. Video titles, channel names and thumbnails belong to their creators and are shown via YouTube. HackerTube Watch is an unofficial edition. Data export of 2026-10-31.