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Comment Re:How about buying PGP? (Score 1) 24

It has a decent UI

Really? Why Johnny Can't Encrypt: A Usability Evaluation of PGP 5.0. Yeah, it was a while ago and some things have improved, but most of the issues remain and I doubt another focus group study would find significantly different results.

The problem is that designing a UI that makes it easy for people who don't know anything about cryptography or security to achieve useful cryptographic security is really, really hard. Almost as hard as educating everyone about cryptography and security enough that they can achieve useful cryptographic security with PGP.

Comment Re:If you believe this (Score 3, Interesting) 126

I know everybody talks about encryption, but the word itself is just the tip of security. What's the key size? What's the algorithm?

It uses Linux dm_crypt. Here's the source code that configures it, and protects the dm_crypt master key: https://android.googlesource.c...

What data is encrpyted?

The /data partition, which holds everything which isn't part of the system image. An easy way to understand the distinction is to note that on unrooted Android devices everything but /data is mounted read-only. So any data that is stored after the device leaves the factory is in /data, and is therefore encrypted, unless it's written to removable media (SD card).

Most of the rest of your post is speculation assuming that Google is intensively mining everything backed up. I'm quite certain that's not true, but I probably shouldn't comment in more detail.

The only thing it will do is keep your private information out of the hands of someone who picked up your lost phone and decided to keep it (or sell it).

Yes, that's what device encryption is for.

(Disclaimer: I'm an Android security engineer. I'm speaking for myself, not for Google.)

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