Divergent Quantum Security Paths for Bitcoin and Ethereum

BroadChain learned that at 15:16 on April 20, according to Cointelegraph, in the face of the potential threat of future quantum computing to encryption algorithms, Bitcoin and Ethereum are adopting distinctly different security upgrade paths. The Bitcoin community tends to favor a conservative strategy, with its core developers generally believing that the existing SHA-256 algorithm remains sufficiently secure for the foreseeable future and that anti-quantum signature schemes (such as Lamport signatures) can be activated via a soft fork as a countermeasure. In contrast, Ethereum is more proactive, explicitly incorporating post-quantum cryptography into its long-term roadmap. Vitalik Buterin has proposed using zero-knowledge proof technologies like STARKs to enhance post-quantum security, which aligns with its philosophy of continuous protocol upgrades. The difference stems from their underlying design philosophies: Bitcoin prioritizes stability and immutability, with upgrades being extremely cautious; Ethereum, as a smart contract platform, needs to flexibly adapt to various cutting-edge challenges, including security threats. Although quantum computers pose a theoretical threat to existing blockchains, the industry consensus is that practical implementation will take over a decade, leaving a technical window for response.