Once purely theoretical, “majority” or “51%” attacks on public blockchains have dealt participants a reality check: The fundamental assumption of Satoshi Nakamoto’s 2008 Bitcoin whitepaper (that computing power will remain sufficiently decentralized in blockchain networks that rely on a “proof-of-work” consensus mechanism) can in practice actually be exploited to enable double spending.

“The system is secure as long as honest nodes collectively control more CPU power than any cooperating group of attacker nodes…. If a majority of CPU power is controlled by honest nodes, the honest chain will grow the fastest and outpace any competing chains. To modify a past block, an attacker would have to redo the proof-of-work of the block and all blocks after it and then catch up with and surpass the work of the honest nodes.” – Satoshi Nakamoto, Bitcoin: A Peer-to-Peer Electronic Cash System

These incidents have provided opportunities for developers of both public and private blockchains, as well as operators of blockchain-based digital asset trading platforms, to learn from the first generation of blockchain deployments.

The plot has thickened in the longest-running “whodunit” in the blockchain space: Who is Satoshi Nakamoto, the pseudonymous creator of Bitcoin and author of the white paper that started it all, Bitcoin: A Peer-to-Peer Electronic Cash System? Published in 2008, Nakamoto’s paper proposed a form of electronic cash that would operate purely peer-to-peer, without the need for a trusted intermediary (such as a centralized financial institution) and in a verifiable manner that protects against the “double-spend” problem. That white paper served as the launch pad for the Bitcoin network and inspired blockchain’s proliferation. Over a decade later, the true identity of Nakamoto and whether Nakamoto is a single person or a collective remain a mystery, despite speculation and multiple claims to the digital throne.

Recently, claimants turned to intellectual property registrations in their campaigns for recognition. In April 2019, Australian entrepreneur Craig Wright (who has long claimed to be Nakamoto) sparked controversy in the blockchain community by filing two copyright registrations claiming authorship of Nakamoto’s white paper (Reg. No. TXu002136996) and the original Bitcoin source code (Reg. No. TX0008708058). In the wake of Wright’s claims, on May 24, 2019, Wei Liu, reportedly a cryptocurrency entrepreneur and a Chinese citizen with an address in California, upped the ante by also filing a copyright registration (Reg. No. TX0008726120) asserting that he had in fact authored the white paper.

The gauntlet, it seemed, had been thrown down.