Grayscale, a digital asset management firm, has released a research note advocating for expedited efforts to make public blockchains resistant to quantum computing threats. The note posits that the technical solutions for this issue already exist, but the more significant challenge is achieving agreement among decentralized communities to implement these solutions. This comes on the heels of a recent paper by Google Quantum AI, which found that breaking Bitcoin's elliptic curve cryptography could be achieved with fewer qubits than previously thought, potentially in under nine minutes once the necessary machinery is in place. The note highlights four key takeaways from Google's research, including the potential for sudden advancements in quantum computing capabilities, the maturity of post-quantum cryptography, varying quantum risk across different blockchains, and the unpredictable nature of timelines.
The research suggests that Bitcoin, due to its UTXO model, proof-of-work consensus, and lack of native smart contracts, may have a lower quantum risk compared to other chains. However, the 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, poses a significant governance challenge.
Possible solutions include burning these coins, taking no action, or limiting their release rate. The Bitcoin community's history of contentious debates over protocol changes may hinder the decision-making process. In contrast, Ethereum faces distinct challenges, with multiple identified attack vectors worth over $100 billion, prompting concerns about its quantum migration timeline.