[Cryptosale75]

For me the Devil is in the behavior. Why would Satoshi go about proving his existence and identity is such a convoluted matter? Simply signing the genesis with a message and posting it pretty much anywhere (bitcointalk, /r/bitcoin, here) for people to verify is all it takes. Not a rambling blot posts full of screenshots and some back-alley interview. This is exactly the kind of 'slight of hand' that a conman utilizes, not a cryptographer of Satoshi's caliber.

[gherkin0]

Didn't Satoshi also sign his earliest messages with a PGP key? If this guy's really Satoshi, couldn't he just sign a new message stating so with that same private key?

[aab0]

No. Satoshi signed nothing with that PGP key that we know. Its purpose seems to have been for other people emailing him.

[jessaustin]

Even so, one who actually possessed that private key could sign a new message with it, and we could use the public key we know to verify that signature.