> I don't think the lack of a durable chain of custody really provides any protection - that protection needs to come from a strong legal system and social contract to protect whistleblowers.
That social contract is quite a bit of a hit&miss if you look at countries across the globe. Same for the strong legal system. Other concerns aside, does this not make the whole approach a non-starter?
>>eqvino+(OP)
I don't think it does but I do see the counter arguments. There have been prominent publicly open political dissidents and they do often suffer from assassination attempts. I think if you're considering political dissent the potential cost is a major factor in that decision. I have not had to make that decision personally so I am not an expert here - but it might be important to consider the value to those people of knowing your evidence can be proven true no matter what the authorities say.