Exposing poorly redacted PDFs


Privacy watchdog group, National Legal and Policy Center has released a PDF detailing Google founder Larry Page’s home (dowload PDF here). They used Google’s Maps and Street View to assemble all of the information. Google is currently involved in a lawsuit resulting from a Street View vehicle traveling and documenting a private road. This PDF was released in response to Google stating that “complete privacy does not exist”.

For some reason the PDF is redacted with black boxes. We threw together a simple screencast (click through for HiDef) to show how to easily bypass the boxes using free tools. You can simply cut and paste the hidden text and images can be copied as well-no need to break out Illustrator. This sort of redaction may seem trivial, but the US military has fallen victim to it in the past.

14 thoughts on “Exposing poorly redacted PDFs

  1. isn’t the most secure way to redact a document the following?

    a) print it out. (on a printer without the yellow dot tracking feature)
    b) cut out the parts you don’t want anyone to see.
    c) scan it back in.

    looks like National Legal and Policy Center didn’t want everyone to know the google exec’s home address.

    ooopsy

  2. Or in acrobat9 pro click Document/Examine Document
    then a new sidebar will open in that expand Hidden text and click show preview
    I think you can figure out the rest

  3. matt, you can do it completely digitally. the key is to convert to a pure graphic image and add the boxes with a graphic editor. there are a number of free pseudo print drivers that will output .bmp, edit with mspaint or whatever, and paste into adobe or even openoffice which will then be unaware that the image contains text at all.

  4. did anyone think mayb that was googles point, ther tryin to prove thers no such thing as true privacy and low and behold its realy easy to c wat they hid in that pdf, idk thats what i thought

  5. YAWN! Why not just re-edit the pdf and delete the information you don’t want shown?

    Too many people are complaining about google earth. Its no more info then what someone would get by driving by your house themselves. “Private drives”, HA, one trip to the local court house and you can get blue-prints of anyones house. So what good is a private drive?

  6. Lol, it’s even easier on Ubuntu. With the eVince document viewer, a preloaded app, all you have to do is highlight over the black boxes and it shows the text underneath.

  7. Is it possible to remove a “redact” placed over a picture that was made in the paint program? (the picture and text was basically just “painted” over in black)

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s