Canon (probably others) have "verification kits" for using digital photography as evidence. This is to verify images haven't been tweaked after the fact. Not

Canon (probably others) have "verification kits" for using digital photography as evidence. This is to verify images haven't been tweaked after the fact. Not sure exactly how it works, but canon at least seems to require the high end 1 series cameras, presumably signing the images.. from the press release: "The kit consists of a dedicated SM (secure mobile) card reader/writer and verification software. When the appropriate function (Personal Function 31) on the EOS-1D Mark II or EOS-1Ds is activated, a code based on the image contents is generated and appended to the image. When the image is viewed, the data verification software determines the code for the image and compares it with the attached code. If the image contents have been manipulated in any way, the codes will not match and the image cannot be verified as the original." https://www.dpreview.com/articles/3146736527/canondvke2 https://www.dpreview.com/articles/3146736527/canondvke2