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Are there any active discussions on post-qunatum migrations?
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Attack on arbitrary account’s assets with stolen secret keys by quantum computers.
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When the actual threat of Quantum-Computer comes is predictable or not?
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If not, we should urgently think about the many malicious attacks on whole of Ethereum(Blockchain) networks.
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Something like discussions in Bitcoin mailing list groups
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like,
- https://groups.google.com/g/bitcoindev/c/Aee8xKuIC2s
- Proposing a P2QRH BIP towards a quantum resistant soft fork
If you have or know any idea ongoing projects about post-quantum migrations, please write on this thread. 
it’will be helpful for all of us in the quantum-Era.
Blocq, Inc
Naoto Sato