@CSB Hacking is playful cleverness; https://www.stallman.org/articles/on-hacking.html

I'm not sure what those fancy quantum computers are meant to do to sha256.

Even if someone was to make a computer that could pump out hashes exponentially faster than than current multiple tetrahash (TRILLIONS of hashes a second) ASIC's, the bitcoin network is designed to adjust the difficulty until blocks take roughly 10 minutes to pass.

Assuming that nobody else gets these computers that that the party uses to mine all the blocks, that still won't allow them to steal bitcoin - only carry out 51% attacks, which allows for double spends, with the losing party realizing later that they weren't actually sent bitcoin when the longer chain gets announced and the shorter chain gets discarded.


There are too many decentralized nodes for it to be feasible to take down the bitcoin network with DDoS attacks also.