How to edit PDF?

[David Teague(T-bird acct)]

Henrik Eismark wrote:

>It would be useful if there was a format that in no way could be  opened and 
>edited so we would always be sure this was an original and fraudless 
>document.
>
>Perhaps some DRM functions in an Adobe applications can do it, but we need it 
>in Linux too.
>
>On 26-11-2005 02:56, 'Forum Post, '@wailuku.xlogicgroup.com wrote:
>  
>
>>In general, open-source software has good support for creating and
>>viewing PDFs, but not good support for editing them. Pdftk and
>>PdfRipImage are good for some things. It would help if the OP would
>>explain what exactly he wants to do and why. Normally the answer would
>>be that you shouldn't have to edit a PDF; if you need to edit something
>>that you received in PDF format, you should just contact the person who
>>created it about getting it in a more easily editable format, such as
>>tex, SVG (editable via inkscape), OOo, etc.
>>
>>
>>--
>>bcrowell
>>
>>    
>>
That is one use for MD5 check sums. It doesn't make the
file inviolable, but it gives the recipient an almost unbreakable
check against tampering.

 David Teague,
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