3 ms·

You'd need to put the key into the camera's processor chip, where it would be hard (but not impossible) to compromise. A minor problem is that any cropping, gam

by kens 12y ago

You'd need to put the key into the camera's processor chip, where it would be hard (but not impossible) to compromise. A minor problem is that any cropping, gamma correction, etc would invalidate the signature. A bigger problem I see is that you could print the fake scene on a big piece of paper, take a picture of that, and the digital signature would be totally valid.

phkahler 12y ago
>> A bigger problem I see is that you could print the fake scene on a big piece of paper, take a picture of that, and the digital signature would be totally valid. That's why I want the date and camera SN to be authenticated as well. A photo of an actual event could be shown to have the correct date, while a photo of an altered print would have a later date.