In r/ethereum, builders debate whether quantum computing is an urgent threat, with emphasis on harvested data being decrypted later and on self custody addresses being vulnerable once their public keys are revealed on-chain.
The moment we have a quantum computer all the data that's been scraped and saved will be decrypter.
We've had the tech for decades, not making it standard is irresponsible, full stop.
self-custody holders with exposed public keys are more vulnerable than exchange users in a post-quantum scenario, not less.
Any address that has already sent a transaction has its public key on-chain, which is what a quantum computer would target.
there is a non-negligible chance that we see the first relevant quantum computer early next decade.
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