I'm not necessarily finding fault with Google, but I am disturbed that so much invisible meta-data is being stored inside images. It makes images trackable, an

I'm not necessarily finding fault with Google, but I am disturbed that so much invisible meta-data is being stored inside images. It makes images trackable, and prevents anonymous speech and reporting unless you are sufficiently tech-savvy to remove them. Even if you are tech-savvy, how do you really know that you removed all hidden data? There's more just Exif to worry about. Hidden image data that I know about so far: (1) Exif meta-data (Exchangeable image file format) which are things like resolution and dates, but can include serial numbers as well. Here's a handy list of cameras (usually high-end ones) that betray your privacy by embedding a serial number: http://www.stolencamerafinder.com/listmodels http://www.stolencamerafinder.com/listmodels (2) IPTC meta-data (International Press Telecommunications Council), though I have yet to see a photo "in the wild" that uses it. (3) XMP meta-data (Adobe Extensible Metadata Platform). This is added by Photoshop for example. It's two long numbers (DocumentID and InstanceID) which are different for each image. (4) DRM and anti-counterfeiting stuff that might be added by image editing tools. Many color copiers do this in the case of paper prints.