>Is that the point of mining? To make inserting hordes of cheap lying nodes impossible? That's called a Sybil attack, and yes that's one of the reasons. Minin

>Is that the point of mining? To make inserting hordes of cheap lying nodes impossible? That's called a Sybil attack, and yes that's one of the reasons. Mining also makes creating blocks have a real world energy cost. So rewriting history quickly becomes almost impossible as blocks are added. An attacker would have to have more than 50% of all mining power for a sustained period of time. I suggest reading the Bitcoin whitepaper, it's short and sweet. https://bitcoin.org/bitcoin.pdf https://bitcoin.org/bitcoin.pdf