Google發表量子計算論文：指以不足1,200個邏輯量子位可攻破256位橢圓曲線加密

Google's paper claims an optimized Shor approach could break 256-bit elliptic-curve cryptography with far fewer quantum resources than previously assumed, directly challenging the security model underpinning BTC/ETH key ownership. The discussion of mempool "onspend" attacks and exposed public keys in dormant wallets raises tail-risk concerns and could elevate risk premia across crypto. Google's 2029 PQC migration target underscores urgency and highlights ecosystem unpreparedness.