File protect via extern USB crypto modul?

[frenic]

Hi All,

I wish the Excel programm - My Workbook like CD push
to sale.
The question: If possible the File protect (like Password) through the extern USB Stick - Crypto modul.

If yes, what must be the VBA protocol.

sory - my English

Thank You very much
Fidele

[Tim Williams]

The password protection on an Excel file has been shown to be easily
cracked, and the file would need to at least be opened for any VBA to run.

So, there's not much to be gained by requiring a "dongle" (hardware-based
key protection). The only sure approach is to port your main code to a dll
and distribute that.

Unless I misunderstood your question.

Tim

--
Tim Williams
Palo Alto, CA


"frenic" <[email protected]> wrote in
message news:[email protected]...
>
> Hi All,
>
> I wish the Excel programm - My Workbook like CD push
> to sale.
> The question: If possible the File protect (like Password) through the
> extern USB Stick - Crypto modul.
>
> If yes, what must be the VBA protocol.
>
> sory - my English
>
> Thank You very much
> Fidele
>
>
> --
> frenic
> ------------------------------------------------------------------------
> frenic's Profile:
http://www.excelforum.com/member.php...o&userid=25297
> View this thread: http://www.excelforum.com/showthread...hreadid=482162
>

[frenic]

HI, Tim

To clear my question about - USB-crypto modul,
I propose You to view the next Web.

http://www.wibu.com

Thanks for your Kindness
Fidele

[Tim Williams]

That's what I thought you meant. My point was that an Excel/VBA application
is itself not secure: there is little to stop someone "decompiling" your
Excel file and a dongle will not prevent that.

Tim

--
Tim Williams
Palo Alto, CA


"frenic" <[email protected]> wrote in
message news:[email protected]...
>
> HI, Tim
>
> To clear my question about - USB-crypto modul,
> I propose You to view the next Web.
>
> http://www.wibu.com
>
> Thanks for your Kindness
> Fidele
>
>
> --
> frenic
> ------------------------------------------------------------------------
> frenic's Profile:
http://www.excelforum.com/member.php...o&userid=25297
> View this thread: http://www.excelforum.com/showthread...hreadid=482162
>