G. Roderick Singleton wrote:
On Fri, 2005-09-16 at 15:04 +0200, cono wrote:
You're right Niklas, that there is no security from password protected
workbooks. Just unzipping the file, is enough to find the contents.
It might of course, be a little barrier to prevent people having access
right away.
Furthermore, one could wonder why bothering about password protection of
workbooks/sheets at all, if the protection is a bit of useless.
Considering the content.xml is encrypted when any OOo file is saved with
password, I do not see how unzipping does anything. Please explain.
Hi Ger,
That's right for file-protection, not for sheet/workbook protection
(Tools|Protect document|...)
Beside that, I've thought about another way, convenient for Calc, to
reach a fine level of security:
a - put data/formula's, vital for using the document, in macro's, and
let the user start those by a button;
b - password protect that library (can't be the Standard-lib).
As far as I've found, this is secure (conversion to xls does not convert
the macro's). If anyone has any doubt, pls let me know ;-)
If you save in a foreign, proprietary format for which there is no API
please explain how OOo should export its security features. I think this
is neither a possible nor reasonable expectation. OOo docs, protected
with digital signatures and encrypted seem very safe to me.
Nor the password protection is exported, nor the macro-code...
And if using the macro-code is essential for benefiting a spreadsheet,
password protection of the library indeed ìs an effective protection.
Greetings,
--
Cor Nouws
http://www.nouenoff.nl
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