When we download a file - we can verify its integrity using a MD5 or sha1 check (e.g hastab). BUT: Between requesting the download of an iso, and it getting burned to DVD (ignore usb) - much can happen. Many believe their machine is clean, when it is not. An iso can get infected - then the malware gets burned in too. A Root-kit could interfere with any verification process. Technically - how can we verify what has been burnt to DVD against an image/hash. How can we thoroughly/expertly verify the purity of what is on a dvd, against the iso file (inc it's hash)? What tools/methods can be used? Also, how does Microsoft Media Creator - ensure that there has been no modification (by malware) of the pure image it has downloaded - and what actually ends up on the DVD? I have seen that for linux - there seem to be a number of tools to verify a burned dvd against an image byte for byte. What solutions exist for windows systems? What tools exist to allow us to check the purity of burned installation images? This thread is meant to be an exploratory discussion of this topic - where any relevant insights and comments are welcome - so we can all learn something. Hopefully some of us can discover new thoughts/ideas/concepts and techniques. All productive contributions welcome.