> To prevent this, Bitcoin uses a proof of work function: each participant in the network gets a share of the voting power corresponding to the effort he or she

> To prevent this, Bitcoin uses a proof of work function: each participant in the network gets a share of the voting power corresponding to the effort he or she spends on calculating sha256 hashes, not to the number of identities one represents. Which leads to the problem that whoever can spend the most money on computing power gets the most votes.