Compression Q?

[Gunnar Swan]

You'll have to compress first, then encrypt.
You dont get good compresson on encrypted data.


2/13/03 9:57:02 AM, "Ramin Firoozye" <ramin at wizen.com> wrote:

>Hi guys,
>
>I have an application where users could put the entire database on a small
>portable device, i.e. one of those USB keychains that behave like a
>hard-disk (not sure how fast the read-times are on those). The scenario
>would be that they can take the data with them on the keychain, plug it into
>a USB port, run the application (enter a password), update the data right on
>the keychain, then just pull it out and walk away.
>
>Anyway, my question is: is there any sort of DB compression planned for 2.0?
>Ideally, something along the lines of the plugins for encryption. These
>small devices start at around 16MB and go up to 256MB, but there's BLOB data
>involved and the cost of the device is an issue so data compression would be
>needed (especially since most of the fields are fixed text with lots of
>empty space).
>
>The thing is, the database would have to be encrypted AND compressed. If you
>lose your keychain, you don't want other being able to get access to the
>data. I can use an external zip utility on an encrypted DB, but that would
>mean they won't be able to use it in-place. I was looking to keep it all on
>the storage device in encrypted form but taking minimal space.
>
>Any ideas? Will there be a way to 'chain' plugins together so you can have
>the data go through zip then encrypt before being written to disk? I haven't
>seen anything in 1.x on this. If I missed it, I'd appreciate a pointer.
>
>Thanks,
>Ramin
>---
>
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Best Regards,
Gunnar Swan
http://www.PracticeToPass.Com
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