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 > To: [EMAIL PROTECTED] > 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]
