[Boneh-crypto-course] Are we keeping up?

[Jeremy Holland]

Man, I was ahead of the curve all of 2 weeks ago, then 2 weeks of work
nightmares happened, and I just finished the problem set for week 3 some
hour or two under the deadline :). So, um, yeah. *Behind*.

- Jeremy Holland

On Mon, Apr 9, 2012 at 1:08 PM, Jason Orendorff
<jason.orendorff at gmail.com>wrote:

> Where are you right now?
>
> I just finished watching "8-4 Tweakable encryption", about disk
> encryption systems.
>
> (Incidentally I found it interesting: unless there's more to it that
> Boneh didn't mention, disk encryption is not disk-wide or even
> sector-wide CPA-secure. I conclude that disk encryption must be
> intended for security against a very specific threat—the bad guys
> physically get hold of your laptop, just once. They can't read your
> data, that's the security property. And if they overwrite a particular
> block, even if they correctly guess what was there, they have no way
> of knowing what they've written.)
>
> (I've been surprised to hear that again and again, the systems with
> really strong security properties are not used in practice, apparently
> for performance reasons. Provably secure ciphers are not used; instead
> we use AES which we think is probably secure. We don't want secure
> systems: we want secure-enough systems.)
>
> -j
>
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