Australian tech entrepreneur Craig Wright identified himself because the creator of controversial digital currency bitcoin on Monday but experts were divided over whether he really was the elusive one that has passed by the name of Satoshi Nakamoto until now.

Uncovering Nakamoto’s real identity would solve a riddle dating back to the publication of the open source software behind the cryptocurrency in 2008, before its launch a year later.

Bitcoin has since become the world’s mostly used virtual currency, attracting the interest of banks, speculators, criminals and regulators.

Worth a complete of $7 billion at current levels, it fell greater than 3 percent on Monday — a typical intraday move for the volatile currency — after the news, to below $440 from around $455, before recovering slightly.

Some online commentators suggested bitcoin’s creator could help resolve a bitter row some of the currency’s software developers that threatens its future.

But Wright made no connection with the row in a BBC interview identifying himself as Nakamoto, and because the protocol bitcoin runs on is open-source and can't be controlled by anyone person, it's unclear whether he could be capable of influence how it develops.

“I was the primary a part of it, other folks helped me,” Wright, who's now living in London, told the BBC. “Some people will believe, Some people won’t, and to inform you the truth, I don’t really care,” he said.

Many bitcoiners said Wright had not done enough to definitively prove that he was Nakamoto, who maintained his anonymity throughout his involvement with bitcoin, which he stepped clear of in 2011.

But Gavin Andresen, who Nakamoto chose to succeed him, published a blog post wherein he described meeting Wright last month and said he's “convinced beyond an affordable doubt” that the Australian is Nakamoto.

Jon Matonis, a founding director of the Bitcoin Foundation now works as a bitcoin consultant, wrote a blog post on Monday which, like Andresen’s, supported Wright’s claims.

“According to me, the proof is conclusive and i've without a doubt that Craig Steven Wright is the individual behind the Bitcoin technology, Nakamoto consensus, and the Satoshi Nakamoto name,” Matonis wrote. He and Andresen also confirmed that they had been answerable for their respective blog posts to Reuters directly.

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