![]() ![]() Add a copy or secure hash of your file to either a trusted third party's tamper evident publicly visible data store for later verification.I added a related followup question:Ĭan I prove that a file (screenshot or otherwise) was generated on or before a particular timestamp? I think parts 1 & 2 have been mostly answered above, but I think this will link them together. I think there are 3 parts to this question, and I think I can reasonably answer all three. However, if you go that way I would strongly recommend to check the Law StackExchange website before engaging yourself into anything. For instance I've read about such procedure being used when someone wants to keep a proof of the existence of a security flaw still valid even once the flaw itself has been corrected. By being present during the screenshot, they will be in measure to vouch the date and the conditions when it has been taken. Be sure to check beforehand that this service does not offer any possibility to modify the picture without altering the upload date!įor higher importance issues, you will have to contact a bailiff or a notary. If you want to prove to others that you took the screenshot on a specific date and not later, you will not be able to do it yourself, you will have to rely on some common trusted third party.įor low importance issues, this can be accomplished by simply posting the image on some well known public service where the date when the image has been posted will be mentioned. ![]()
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