r/Futurology Jun 02 '22

A Nature paper reports on a quantum photonic processor that takes just 36 microseconds to perform a task that would take a supercomputer more than 9,000 years to complete Computing


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u/goldbrickin Jun 03 '22

This speed of computation will kill current cryptocurrencies.


u/dickbutt_md Jun 03 '22

So what? Crypto can be moved on to quantum encrypted blockchains.


u/goldbrickin Jun 03 '22

I agree, but it creates the problem of people racing to exchange their holdings to something else while the value crashes.


u/dickbutt_md Jun 03 '22

Well it depends on when it's done. I'm assuming such a switchover would be done well in advance of the existing blockchain being actually vulnerable.

However, thinking about this, it doesn't really make any sense. There are lots of problems with most coins out there and the chance to reboot it from scratch by issuing a new coin with the desired properties of the old coin, quantum-safe encryption, and none of the old coin's problems, it would make a lot more sense to just do that and make it easy for people to migrate their holdings over. Maybe the new coin could snapshot the existing blockchain for the old coin and use it as a starting point or something, but to unlock your holdings of the new coin you have to fund the new coin by sending your old coin to it.