On 2007-12-11 John C. Welch wrote:
> On 12/11/2007 21:55 PM, "Ansgar -59cobalt- Wiechers" wrote:
>>> Actually, I don't think FV does on the fly encryption of every write
>>> you do, but I could be wrong there. That kind of encryption has a
>>> non-zero amount of overhead, and because you're talking about a lot
>>> of encryption/decryption throughout the day (even if you never
>>> recover something), that's a significant resouce hit.
>>
>> It is. However, anything else would defeat the purpose of FileVault,
>> because then files would have to be cached unencrypted outside the
>> FileVault. AFAICS.
>
> When you're logged in, you don't care, at that point, it's a physical
> "don't let people play in your login" issue. You only care about FV
> encryption when you aren't logged in. As long as nothing's left
> unencrypted outside of FV when you're not logged in, it's all good.
I don't see how you'd be able to guarantee that without on-the-fly
encryption. Simple example: if files are cached outside the FileVault
something like a power outage may lead to data leakage.
Regards
Ansgar Wiechers
--
"Another option [for defragmentation] is to back up your important files,
erase the hard disk, then reinstall Mac OS X and your backed up files."
--http://docs.info.apple.com/article.html?artnum=25668
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