Re: overlayfs vs. fscrypt

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Am Mittwoch, 13. März 2019, 16:16:33 CET schrieb Theodore Ts'o:
> So before we talk about how to make things work from a technical
> perspective, we should consider what the use case happens to be, and
> what are the security requirements.  *Why* are we trying to use the
> combination of overlayfs and fscrypt, and what are the security
> properties we are trying to provide to someone who is relying on this
> combination?

Well, as stated, on (deeply) embedded systems overlayfs is common.
You have a lowerdir with read-only files and an read-write upper dir.
Of course both lower and upper directory need to be encrypted.
In my case ubifs+fscrypt, sometimes also combined with an encrypted+authenticated
squashfs.

Thanks,
//richard





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