This article features code that make use of the Piexifjs Node.js package to read, edit, and erase Exif data from a set of sample photos. You can include Piexifjs directly in an HTML page by linking to piexif. Piexifjs is available as a Node.js package and can be installed by using npm as shown below: npm install piexifjs Unlike most other JavaScript Exif libraries, Piexif not only allows you to read Exif data, but edit and erase it as well. There are a number of JavaScript libraries that can access the Exif data in digital photos. Before continuing, you should download these images from this article’s companion Github repository and put them into a directory named images. In the exercises below, you’ll use images containing Exif metadata. Along the way, you’ll use not just your programming skills, but you’ll do some detective work as well! This article will answer these questions with the help of JavaScript and the Piexifjs library. How can I alter, add, or erase Exif metadata programmatically?.How can I programmatically detect and read the Exif metadata in photos?.Combined with the site’s poor security, these recordings provided law enforcement with evidence that clearly placed the people who made them at the scene of the crime.īeing the security-conscious developers that I suspect you are, you’re probably asking yourself questions like these: Many of the participants posted photos and videos to a social media site that didn’t take the precaution of “scrubbing” their Exif data during the upload process. The January 6th storming of the United States Capitol is full of examples of incriminating Exif. In his DEF CON 23 presentation, Confessions of a Professional Cyber Stalker, security analyst Ken Westin talked about the privacy problems that Exif can cause. The 2012 privacy incident involving antivirus company founder John McAfee is a popular one. Information security professionals tell cautionary tales about Exif metadata. However, it also introduces privacy and security concerns that many users don’t take into account. This metadata is useful for sorting, cataloging, and searching through photos, which is why the Exif standard was defined. Various camera settings, including zoom, aperture, and flash.The speed at which the camera was moving when the photo was taken.The altitude at which the photo was taken.The orientation of the device when the photo was taken.Where the photo was taken, with the accuracy of GPS.The date and time when the photo was taken, down to the millisecond.
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