Re: A good encryptor for old Mac OS X 10.2.8?

On 2008-06-17 20:10:26 +0100, Howard Brazee <howard@[EMAIL PROTECTED]
> said:

> On Tue, 17 Jun 2008 17:17:11 GMT, me@[EMAIL PROTECTED]
 (Király) wrote:
> 
>> In comp.sys.mac.apps Howard Brazee <howard@[EMAIL PROTECTED]
> wrote:
>>> What are your wants and needs?   I created an encrypted virtual drive
>>> using OS X features.   It was sufficient for my needs.    One downside
>>> is that I periodically need to copy it by hand, as I have it excluded
>>> from my Time Machine (I don't want to back up anything that big just
>>> because I changed one small file in it).
>> 
>> You would benefit from using a sparse bundle instead of a sparse image.
>> An item added to a sparse bundle will tend to change only a few of the
>> embedded bands.  When backing up with TM, only the changed bands will
be
>> added; not the whole thing.
> 
> I don't quite understand what you're saying (sounds as though I don't
> need to use my procedure), and I don't understand at all what I need
> to do.

Sparse bundles are a Leopard-specific format of disk image. A sparse 
bundle is a folder containing multiple files (bands) which when put 
together contain all the disk image data. The point is, when you just 
update a bit of the whole disk image you tend to just end up changing 
one of the bands. Thus Time Machine only needs to back up one of the 
bands.

The other alternative to OS X's and TrueCrypt's encrypted disk images 
are PGP's encrypted disk images. PGP is however commercial.

Cheers,

Chris