Grayscale, a digital asset management firm, has released a research note advocating for accelerated efforts to make public blockchains resistant to quantum computing threats, emphasizing that the main hurdle lies not in the technical implementation but in achieving consensus among decentralized communities. This comes on the heels of Google Quantum AI's recent paper, which suggested that breaking Bitcoin's elliptic curve cryptography could be achieved with fewer than 500,000 physical qubits, potentially in under nine minutes.
The research note outlines four key takeaways from Google's findings, including the unpredictable nature of progress toward a cryptographically relevant quantum computer, the maturity of post-quantum cryptography solutions, the variability of quantum risk across different blockchains, and the lower quantum risk associated with Bitcoin due to its transaction model and consensus mechanism. However, the note also highlights the challenging question of what to do with the approximately 6.9 million BTC in wallets with publicly exposed keys, including those believed to belong to Satoshi Nakamoto, with potential solutions including burning these coins, taking no action, or limiting their spending rate. This dilemma is further complicated by the history of contentious debates within the Bitcoin community over protocol changes, contrasting with the situation of Ethereum, which faces multiple attack vectors worth over $100 billion and has been taking steps such as aggressively staking ether into validators.