Solved

How to add unique identifier to PDF as image

Posted on 2011-02-10
2
567 Views
Last Modified: 2012-06-27
I want to add a unique identifier (UID) to a PDF report.  This identifier will ideally be in graphical form, and unrecognizable as a UID.

Does anyone know potential formats, websites that discuss such techniques?  

A barcode is obviously one example, but I'm looking for me creative solutions...
0
Comment
Question by:billelev
2 Comments
 
LVL 62

Accepted Solution

by:
btan earned 500 total points
ID: 34877221
I will say that your UID is quite similar to watermarks for PDF and of visible type.

You may want to check out this "hiding" of watermark in images which most common is to embedded the information in the pixel of the image @ http://www.isr.umd.edu/~minwu/public_paper/Jnl/0408binwmk_IEEEfinal_TMM.pdf

On related note, I take it as stegnography as well but on digital image. @ http://www.garykessler.net/library/steganography.html
 
Barcode as mentioned is one mean and the new "2-Dimensional" bar code symbologies like PDF417, Aztec Code and Data Matrix are useful to encode several thousand bytes of data in a single bar code symbol including text or binary data. You may want to check out Adobe LiveCycle Barcoded Forms ES @ http://www.adobe.com/ap/products/livecycle/barcodedforms/indepth.html

Moreover, 2D barcode has more variation that will be useful to explore. Nonetheless, ppl may not necessarily know since there so many variation. Can check out
@ http://www.adams1.com/stack.html

One interesting encoding is ColorCode which is designed to store URLs and be read by a cell phone camera. In your case, URL is your UID

I was thinking of Mosaic Coding can be another interesting scheme but no open techniques. Probably have to self improvise e.g. each character of the UID can be an image randomly selected from a pool of image database. All images will be selected and thereafter used to create a mosaic of a base image. The latter would be first character mapped image.
0
 

Author Comment

by:billelev
ID: 34888271
Great, thanks.  Exactly what I was looking for.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Nothing in an HTTP request can be trusted, including HTTP headers and form data.  A form token is a tool that can be used to guard against request forgeries (CSRF).  This article shows an improved approach to form tokens, making it more difficult to…
Never store passwords in plain text or just their hash: it seems a no-brainier, but there are still plenty of people doing that. I present the why and how on this subject, offering my own real life solution that you can implement right away, bringin…
Sending a Secure fax is easy with eFax Corporate (http://www.enterprise.efax.com). First, Just open a new email message.  In the To field, type your recipient's fax number @efaxsend.com. You can even send a secure international fax — just include t…
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

929 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

11 Experts available now in Live!

Get 1:1 Help Now