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The Only Safe Phone Is One Even the Police Can't Unlock

CGP Grey · 4.1M views · 2016-04-14 · 4:38

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Overview

A five-minute CGP Grey explainer arguing that a phone is effectively an extension of your mind, and that any backdoor or master key into encrypted devices will inevitably be abused or leaked. It frames the encryption debate as locks that are either unbreakable or absent.

On Hacker News

HN commenters use it as a short, persuasive primer to send to non-technical people in debates over encryption backdoors and decryption legislation.

Recommended by 4 HN people across 4 months · HN mentions 2016–2025

Topics

Privacy, surveillance & cybercrimeCryptography
Search by tags
encryptionbackdoorsprivacylaw enforcementsmartphones

What people said

lukifer · 2019-07 · Recommendation

If you need to explain to non-technical friends and family exactly why this is a terrible idea, CGP Grey offers an easily digestible 5-minute primer: [VIDEO] Computers either have unbreakable locks, or no locks whatsoever. There's no stable middle ground.

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urda · 2019-04 · Recommendation

> The FBI asked Apple to put a build on a phone that would allow them to brute force the passcode, leaving the device and the build on Apple's premises the entire time. It doesn't matter how well it might be locked down or secured. If the government coerced them into building it, it wouldn't be difficult to go one more step and require apple to hand over the modified OS. This [1] does a great job of explaining why building a master key is just a bad idea. This is a pandora's box we do not need to open. [1] [VIDEO]

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sillysaurus3 · 2017-05 · Recommendation

Yes. [VIDEO] is a pretty good video for persuading people why this legislation is a bad idea. We might still be able to beat it by rallying support.

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Sources

Video by CGP Grey, played through YouTube.

Data and selection notes

HN summaries and labels may contain AI errors. HN dates refer to discussions, not video publication.

HN Library: HackerTube export (2026-10-31) and open-index/hacker-news. Upstream summaries and classifications may contain AI errors.

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