Quantum Computing: Shaking Up Blockchain Security? Recently, quantum computing technology has rapidly emerged as a new threat to Bitcoin's security. Quantum computers transcend the limitations of existing cryptographic technologies, offering the technical potential to fundamentally shake Bitcoin's core security system. However, experts point out that the problem is not merely a technical one. This crisis also stems from flaws in the governance structure that underpins Bitcoin. This is not just a technical discussion but could become a major coordination problem that outpaces the response speed of the entire blockchain ecosystem, carrying significant implications for the global economy and Korean investors. According to an op-ed titled 'Bitcoin's Quantum Problem Is Really A Governance Crisis In Disguise' by Guillaume Girard of UTXO Management, the quantum computing threat facing Bitcoin is less a technical issue and more a governance crisis. The possibility of Elliptic Curve Cryptography (ECC), the primary basis of Bitcoin's current security, being deciphered by Shor's Algorithm on a quantum computer is gaining prominence. This highlights the potential for large-scale Bitcoin theft if a sufficiently powerful Cryptographically Relevant Quantum Computer (CRQC) meets the requirements to extract private keys from public keys. Indeed, Google's Quantum AI research team has published findings indicating that ECC-based cryptography could be broken with fewer than 500,000 physical qubits. Google itself aims to be ready for Post-Quantum Cryptography (PQC) by 2029, demonstrating that this threat is moving beyond theoretical levels to a concrete timeline. Approximately 1.7 million BTC, stored in legacy addresses where public keys are permanently exposed on the blockchain, are most likely to be affected first, serving as a critical warning sign for Bitcoin holders worldwide. South Korea is one of the countries with very high interest in virtual asset investment, and domestic investors are not immune to such global security threats. However, Girard's core emphasis lies elsewhere. He states that the Bitcoin community already possesses technical solutions to this quantum computing threat. The problem is that the consensus-building process to actually implement these solutions is excessively slow. Bitcoin's governance system operates in a way that takes a long time to reach broad consensus, making it vulnerable to rapid response. Girard likens the governance process for managing protocol changes to the slow pace of a state legislature passing a bill, criticizing it as a system structurally ill-suited for proactively responding to technical threats. This governance sluggishness further complicates the adoption of quantum-resistant cryptography. While there is optimism that a CRQC does not yet exist and may not reach the threshold needed to break Bitcoin's cryptography, this could be an overly complacent attitude towards risk. As Girard argues, the Bitcoin community must act now. Discussions on adopting quantum-resistant cryptography are expected to face considerable difficulties under the existing consensus structure, raising concerns that it might be too late to respond when the actual threat materializes. Is Governance Slowness the Core of the Problem? The cryptocurrency market in South Korea holds a significant share of global investment, and domestic investors are highly sensitive to market fluctuations and technical risks. While many Korean investors make investment decisions based on trust in Bitcoin's global technical stability, new threats like quantum computing have the potential to fundamentally undermine existing security systems. Particularly given that a significant portion of Bitcoin held by Korean investors is exposed to traditional public-key-based encryption methods, global regulatory and security issues inevitably have a direct impact on the Korean market. There is also a counter-argument that it will take a considerable amount of time before quantum computing operates at a commercial level. Some argue that it will take decades for CRQCs to reach a level that can truly threaten Bitcoin. However, such optimism is problematic from a risk management perspective. If quantum-resistant cryptography is not adopted, it might be too late to respond if commercial quantum computers suddenly emerge. Even if a technical threat does not materialize immediately, a proactive response system is essential from a risk management standpoint. Girard's op-ed emphasizes precisely this point: despite the Bitcoin community already possessing technical solutions, the slowness of the consensus-building process is the biggest obstacle. This is not merely a problem of technological development but reveals the inherent limitations of decentralized governance structures. Bitcoin's decentralized decision-making structure ensures security and democracy but simultaneously faces the dilemma of being unable to respond quickly when urgent proto
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