Invisible wrote:
> You could have the camera write a digital signature and make it really 
> awkward to get at the encryption key [which must, necessarily, be 
> present inside the camera somewhere]. But when, if you have an image in 
> RAW format, I would imagine it's fairly easy to fake anyway.

And then what? Everybody at Canon can forge image signatures? Better (at 
least legally speaking) to have the photographer say "Yes, I took that." 
Then it becomes just another detail, rather than an actual piece of 
evidence. I.e., it becomes a quick way of saying "this is what the 
photgrapher saw" instead of having him sit and describe it.

It's like your signature on a contract. Very rarely does someone try to 
claim that their signature isn't really what's on the contract. That's why 
the credit card companies don't care if you sign your name with a picture of 
  mickey mouse or something. The actual signature doesn't matter, only that 
you wrote on the line that says "by writing on this line you agree to pay."

> Most people don't just happen to have a Nikon DSLR in their pocket when 
> they witness a robbery. They shoot people with camera phones and stuff.

Well, it's also police photographing evidence. It's not like you can leave 
the bullet casings on the floor until it's time for the trial.

-- 
   Darren New, San Diego CA, USA (PST)
   I ordered stamps from Zazzle that read "Place Stamp Here".

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