Quantum computers pose a significant risk to the security of cryptocurrencies, potentially breaking the cryptographic protections of networks like Bitcoin and Ethereum. A report from Mysten Labs highlights that newer blockchains utilizing the EdDSA signature scheme—such as Solana and Sui—are better positioned to resist quantum threats, while older chains face more considerable challenges implementing necessary upgrades. As demands for quantum-resistant standards increase, experts stress that Bitcoin and Ethereum will need upgrades to secure their networks against future quantum attacks. This transition may require complex solutions, including hard forks that alter wallet structures, which could lead to community disputes similar to the Ethereum hard fork incident in 2015. The urgency is underscored by projections from researchers indicating that quantum capabilities might evolve to a point where breaking existing cryptography becomes feasible within a decade.

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