Well as the quote attributed to Hawkins says. It would have been an awful lot easier for anyone to raise funding if a government guarantee was in place. Suppose like Dr Ranson it will be down to analyzing meta data in documents. How easy is it to create a perfect fake of a document that doesn’t link back to who created it? How easy is it to cut and paste a digital signature left on one document into another document without leaving a trail? Presumably all relevant documents are discoverable.