Government security, Law & order, NSA, Privacy Tool scrubs hidden tracking data from printed documents dev_threatravens July 3, 2018 Just because a document isn’t digital doesn’t mean it doesn’t contain metadata. Printed documents often have their own hidden details, and now German researchers have developed tools to help you scrub them clean. Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on WhatsApp (Opens in new window)