This data verification kit, for the EOS-1Ds, EOS-1Ds Mark II, EOS-1D Mark II, EOS 20D, EOS-1D Mark II N, EOS 5D and EOS 30D allows you to prove that digital images have not been tampered with, enhanced or manipulated. Indispensable for law enforcement, insurance, news and other agencies where legitimacy and copywright is an issue.