idea for secured(non-editable) document

[labmaster]

I am thinking about some scured data document.

In my current work, I made a public non-commercial program for data aqusition in leagal metrology

according to some fixed procedure.

The output result file should not be modified by a user.

Some text output-file could be editable by user.

On the other hand, it will be very inconvenient to use (read) a predefined binary file developed by myself.

(this option will need to develop some more extra program to read the file).

How about watermasked image of the result? it has also some weak point (non-text file).

Does anyone know some convenient public format or method for my purpose (non-editable)?

For example, if possible, I want to use some MS-word file with a read only password option.

(I believe MS-word will continue to develope as time goes on.)

[Xavier.Berger]

You could maybe use a pdf printer... you would get a pdf file that use a standard format and not editable by the user.

Hope that helps....

Regards

Xavier

[labmaster]

I want to make a program in LV.

Can I make a pdf file by LV?

[Xavier.Berger]

I dont think you can edit or create document in Labview. What i have in mind is create your report (text document, frontpanel or picture...) in labview and then print it to a "pdf printer" which works like a printer. Try "PDFCreator" or another pdf printer to test it.

Regards,

Xavier

[smercurio_fc]

You can get ActiveX controls that allow you to create PDF files... http://www.google.com/search?hl=en&q=create+pdf+file+activex&btnG=Google+Search
I don't think there's any free ones, but you can check out the Google results. The PDF printer is a good idea, as there are free ones of those.

[andre.buurman@carya]

LabVIEW PDF toolkit (shameless, )

A PDF document is editable with the right tool, but could be locked. You need some kind of document hash that can be used to verify that the document has not been tampered with.

André

Message Edited by andre.buurman@carya on 10-17-2007 06:01 PM

[smercurio_fc]

Plug, yes, but you forgot to provide a URL: http://www.carya.nl/downloadpage_uk.htm#Carya%20PDF%20Toolkit%20V1.0%20('Free%20Version').

[labmaster]

Thanks all.

Actually, PDF can be also edited in acrobat professional version very easily.

I am not sure pdf creator can lock some password.

Does anyone know another simple secured format?

(Can I give a password to MS-word in report generation toolkit?)

[Xavier.Berger]

You can add pasword protection using PDFcreator by setting it  in options panel :

The LabVIEW PDF toolkit seems to be a good option and should be more flexible, but I don't know about password protection if you use this toolkit. Maybe André could tell us...

Regards,

Xavier

Message Edité par xa le 10-18-2007 12:08 PM

[andre.buurman@carya]

At the moment its not part of the toolkit. But what not is can be created as long as it is part of the PDF specification and there is an intend to buy.

Instead of trying to prevent the editting of a document, a mechanism of determining an unauthorised edit is probably easier and serves the same purpose. It allow you to tell if the data is still the original data.

André