> You could just as well throw out all the expensive cryptographic stuff, send them your transactions and let them manage them in an Excel sheet Hmm, that's no

> You could just as well throw out all the expensive cryptographic stuff, send them your transactions and let them manage them in an Excel sheet Hmm, that's not really how these attacks work. When a miner doesn't mine according to the rules, their blocks are invalid and rejected by the network. edit: Unfortunately you have now given me an opportunity to admit that Excel is probably capable of running Bitcoin-equivalent software, though.... I would prefer not thinking about this.