719 reputation
620
bio website whitemagicsoftware.com
location Victoria, Canada
age 40
visits member for 4 years, 7 months
seen 2 days ago

http://whitemagicsoftware.com

Read my technical manual Indispensable, which covers Business Intelligence with JasperReports and R:

http://whitemagicsoftware.com/books/indispensable


Feb
4
accepted Generate or update a PDF to include an encrypted, hidden watermark?
Jan
28
comment Launch VIM and show, or hide, row numbers
Thank you. Nice use of parameter expansion.
Jan
28
accepted Launch VIM and show, or hide, row numbers
Jan
27
comment Launch VIM and show, or hide, row numbers
Looks like there were other problems with the source. Missing quotes on other items, for example.
Jan
27
asked Launch VIM and show, or hide, row numbers
Jan
15
comment Add constant value to numeric XML attribute
That's the trick. Thank you.
Jan
15
accepted Add constant value to numeric XML attribute
Jan
14
asked Add constant value to numeric XML attribute
Dec
28
comment Generate or update a PDF to include an encrypted, hidden watermark?
Did you ever find a PDF in the wild and trace it back using this technique?
Dec
26
accepted Linked code, syntax highlighting, frames, and captions
Dec
26
revised Linked code, syntax highlighting, frames, and captions
Evidence that it is not possible.
Dec
26
comment Linked code, syntax highlighting, frames, and captions
@JoshN: I believe that you made it work for you. Your instructions did not work for me, as per the errors I listed. I have revised the question a bit to more accurately reflect the intent of the question. I really do appreciate you taking the time to try and find an answer.
Dec
26
revised Linked code, syntax highlighting, frames, and captions
added 90 characters in body
Dec
26
comment Generate or update a PDF to include an encrypted, hidden watermark?
@Wil: The book is written in LaTeX, which generates PDFs exactly how the end result should appear -- as a single PDF file. Using CSS/HTML to generate an additional page to insert into the document is not feasible for many reasons. The major reason being auto-generated cross-references. See: i.imgur.com/eEFom.png
Dec
26
comment Generate or update a PDF to include an encrypted, hidden watermark?
@Wil: I see. Page 31 becomes an image subjected to steganography. So long as the page has no content (otherwise the page cannot be searched), that might be a viable solution. The problem, then, is that pages without content can be removed. Definitely something to consider. Thanks for the clarification.
Dec
26
revised Generate or update a PDF to include an encrypted, hidden watermark?
edited title
Dec
26
comment Generate or update a PDF to include an encrypted, hidden watermark?
@Wil: The protection mechanism of steganography is not viable in this situation. I don't know if images would survive PDF -> EPS -> PDF. Adding "text somewhere" is an interesting idea; more details would be good. Ideally, if there was a program that could apply a watermark to a PDF, then the PDF-generation process would remain streamlined. Thanks for your comments!
Dec
26
comment Generate or update a PDF to include an encrypted, hidden watermark?
@Wil: What I am trying to do is find a way to identify whose copy of the PDF it was if it is released into the public domain (without permission). The document is written in LaTeX.
Dec
26
comment Generate or update a PDF to include an encrypted, hidden watermark?
@pipitas: If a registered version of the PDF is released, without permission, into the wild, I would like to know who released it. But if people can see that the PDF has a watermark, then the watermark becomes that much easier to circumvent.
Dec
26
revised Generate or update a PDF to include an encrypted, hidden watermark?
deleted 3 characters in body