Satoshi actually never, ever signed anything cryptographically.

We don't even know for sure if whitepaper Satoshi, genesis block Satoshi, email address(es, there were two) Satoshi, and BitcoinTalk Satoshi were the same person.

On 3 July 2018 at 15:07, Georgi Guninski <guninski@guninski.com> wrote:
On Mon, Jul 02, 2018 at 07:03:24AM -0700, mark M wrote:
> http://nakamotofamilyfoundation.org/
>
> http://nakamotofamilyfoundation.org/duality.pdf
>
> http://nakamotofamilyfoundation.org/cryptogram.html

Is this the real Nakamoto, speculations?

Didn't see crypto key to prevent potential future impostors of this
"identity".