Gavin Andresen, chief scientist of the Bitcoin Foundation, said at a conference yesterday that he believes Craig Wright is Satoshi Nakamoto, the pseudonymous inventor of Bitcoin. Andresen said that his accounts were not hacked before his endorsement of Wright as Satoshi, countering speculation from some in the Bitcoin community. Wright, an Australian computer scientist, revealed himself as Satoshi in a blog post and in articles published yesterday by The Economist and BBC, six months after parallel investigations by Gizmodo and Wired identified Wright as a strong Satoshi candidate. Among the evidence offered in yesterday's reporting was a strong endorsement from Andresen, who took over lead development of the cryptocurrency after Satoshi Nakamoto stepped back from the Bitcoin community in 2011. "I believe Craig Steven Wright is the person who invented Bitcoin... I am very happy to be able to say I shook his hand and thanked him for giving Bitcoin to the world," Andresen wrote.
Wright's reveal, and Andresen's support, prompted wide scepticism in the community, with some speculating that Andresen had been hacked. He addressed the criticism while speaking on a panel this morning at Consensus 2016, a cryptocurrency conference in New York City. "I'll first say, I was not hacked. The blog post that I posted this morning... is indeed my words. I still believe that Craig Wright is, beyond a reasonable doubt in my head, Satoshi Nakamoto," Andresen said at the beginning of the panel, which Gizmodo accessed via livestream.
The Bitcoin community's scepticism about Wright's reveal had to do with an apparent flaw in the cryptographic proof he offered of his identity. A widely circulated blog post by a developer named Patrick McKenzie called the reveal "flimflam and hokum", pointing out that the cryptographic signature Wright used was apparently derived from a different block of text than the message it was supposedly signing. Andresen would not have signed off on a dubious identification, according to the sceptics, opening the possibility that someone else had accessed his accounts. The suspicion was serious enough that Andresen's access to contribute to a Bitcoin project known as Bitcoin Core was revoked.
At the end of the panel, which primarily focused on issues other than the identity of Satoshi, Andresen elaborated on his support for Wright. Andreen said that he had privately witnessed Wright giving more thorough and convincing cryptographic proof of his identity than what had been offered in the blog post, a claim he also made earlier this morning on Reddit.
"He signed, in my presence, using the private key from block one — block number one, the very first mined Bitcoin block, on a computer I'm convinced had not been tampered with, on software that I'm convinced had not been tampered with, a message of my choosing. And so that kind of sealed the deal for me, convincing me that he does have that private key," Andresen said. "My interactions with him feel like this is the inventor of Bitcoin."
"I remind everyone, he is human. I'm sure he makes mistakes like we all do," he continued. "He's made some mistakes in the past. And he wants his privacy. So I'm going to draw a line. If you ask me questions about this, I draw the line at: I will explain why I'm convinced. I will not go into personal details of the discussion that I had with him."
Not everyone was convinced. Immediately after Andresen gave his closing statement, another panel member, Vitalik Buterin, a prominent cryptocurrency developer, interjected. "Just to sow a bit of controversy for fun, I'll explain why I think he's probably not Satoshi," Buterin said, before questioning why Wright didn't offer more conclusive proof in public. The room erupted into applause.
Screenshot: Consensus 2016 livestream