Re: File/Folder Encryption

Hi Erol,

I think the whole thing will be backed up all over again, as it's a
single file in that regard. On the other hand, how big is this
collection of documents? It may be a non-issue unless you've got a huge
archive that you can't separate from working documents.

You could have multiple sparse disk images and use them just like
folders, if you have various categories, which would break up the total
into smaller chunks and mitigate the issue somewhat. Your mileage may
vary...

I wouldn't nest them though, that might be pushing one's luck.

-J

Erol Kepkep wrote:
> Hi Greg,
>
> Do you know if the .sparseimage file will have any issues being
> backed up by TSM?
>
> I believe that the FileVault feature of MacOSX creates a .sparseimage
> file of the encrypted user folder. I've seen that the
> username.sparseimage file is the only file visible in the .username
> folder of the FileVault encrypted user account when looking at the
> file list for backup in TSM. I assume that username.sparseimage file
> contains all of the encrypted files and the file directory structure.
> Of course, the problem with this is that the entire file would most
> likely be backed up even if only one small file is changed. That
> would result in a very large backup volume.
>
> It's looking like the encrypted sparse disk image for sensitive
> documents is going to work the best as long as there are no issues
> with the backup of the encrypted .sparseimage file.
>
> Thanks,
>
> Erol
>
>
> At 9:20 AM -0800 12/12/07, Greg Merritt wrote:
>
>> On Dec 11, 2007, at 5:15 PM, Erol Kepkep wrote:
>>
>>
>>> I'd prefer a
>>> simple encrypted folder, if that's possible, so I wouldn't need to
>>> worry about the disk image size.
>>>
>> Oh! No problem. Just create it as a "sparse disk image". This will
>> give you a small image file size which will only grow as content is
>> added to the image.
>>
>> I just made an 8GB encrypted sparse disk image. Empty,
>> the .sparseimage is 31 megabytes.
>>
>> -Greg
>>
>>
>>
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>
>
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-- 
Jay Bryon
Senior Network Engineer, U.C. Berkeley/IST/IS/NSO 
jay_at_berkeley.edu
2-5636
"Any idiot can be complex, it takes real genius to be simple"
-Al Einstein
[Unless stated explicitly otherwise, all opinions are my own (or Al's) and do not represent official policy of any part of IST, U.C. Berkeley or the U.C. Regents.]  
 
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