Quantum Computing Timeline Misconceptions Drive Premature Blockchain Security Response, Says A16z Crypto

TLDR: Cryptographically relevant quantum computers are unlikely before 2030 despite corporate claims of imminent breakthroughs.  Harvest-now-decrypt-later attacks demand immediate post-quantum encryption deployment for long-term confidentiality.  Digital signatures and zkSNARKs lack the harvest-now-decrypt-later vulnerability, allowing deliberate migration timelines.  Bitcoin faces unique governance and abandoned coin challenges requiring early planning independent of the quantum timeline.   Quantum [...]

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