Metadata: The Hacker's Breadcrumb Trail (And How to Wipe It Clean)
What is metadata? Common files have ‘data about data’ known as metadata, which shows information such as where an image was taken or who the author of a PDF is. These are known as attributes and they are also valuable data malicious actors can exploit. Here is a table on common file types, what metadata they contain, and the purpose of the metadata. File Type Common Metadata Purpose/Details Documents (.docx, .pdf, .xlsx, .pptx) Author/Creator, Creation/Modification Dates, Last Saved By, Company/Organization Name, Comments/Tracked Changes, Document Revision Number, Software/Application Version used to create it, Print Date, Template name. Tracks document history, ownership, creation environment. Comments and tracked changes are often hidden, but remain in metadata. Images (.jpg, .png, .tiff) Exif Data (Exchangeable Image File Format): Camera Make/Model, Date/Time the photo was taken, Geolocation (GPS coordinates), Exposure settings (shutter speed, aperture), Image resoluti...