Ok, I've done so. ASCII filters such as ASCII85 and ASCIIHex will be
disabled/ignored when encryption is active.

On 15.03.2003 17:18:41 Patrick C. Lankswert wrote:
> From my understanding of the spec, encryption MUST be the last step.
> Encryption will not make the size grow, but it does negate any benefit that
> ASCII85 or ASCIIHEX filters provide and THEY do make the file larger.
> In a nutshell, I would disable the ASCII85 or ASCIIHEX filters, if
> encryption is enabled.
> Pat
> -----Original Message-----
> From: Jeremias Maerki [mailto:[EMAIL PROTECTED]
> Sent: Friday, March 14, 2003 4:13 AM
> Subject: PDF Encryption: Clarification
> Do I interpret the PDF specs correctly that if encryption is applied it
> doesn't make sense to apply ASCII85 or ASCIIHEX filters, because the
> generated PDF will always be binary and the filters only increase the
> file size? So, these two filters could be disabled in this case. Right?
> Here's the key paragraph from PDF 1.3, page 64:
> > Stream data is encrypted after all stream encoding filters have been
> applied (and is
> > decrypted before the stream decoding filters are applied). Decryption of
> strings,
> > other than those in the Encryption dictionary, is done after
> escape-sequence
> > processing and hex decoding as appropriate to the string representation
> described
> > in Section 4.4, “Strings and text.”

Jeremias Maerki

To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, email: [EMAIL PROTECTED]

Reply via email to