[pdftex] Usage of \pdfcrypt

[Hans Hagen]

At 10:26 AM 8/22/2001 +0900, Akira Kakuto wrote:

>    \pdfcrypt parameter         meaning
>    --------------------------  ----------------------------------------
>    owner {the owner password}  to define the owner or security password
>
>    user {the user password}    to define the user or open password
>
>    print                       to give printing permission
>    copy                        to allow selecting text and graphics
>    edit                        to allow modifing (edit) the document
>    annotate                    to allow changing notes and form fields
>    all                         to allow all above
>
>    noprint                     to deny printing permission
>    nocopy                      to deny text and graphics selection
>    noedit                      to deny document modification
>    noannotate                  to deny changing notes and form fields
>    none                        to deny all above

Does these flags play a role in calculations? If not, I suggest that they 
are replaced by a

   attr {...}

k/v pair, since this is extensible without the need to change the program. 
This would also conform to other low level pdf primitives. Since most users 
use a higher level macro package, calculating the flags is no problem. The 
less hard coded keywords, the better. Also, this approach would permit 
additional entries in the associated dict.

Hans

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