I wonder about a vulnerability: what happens if an organization buys so many computers to create so many nodes they will be about 25-50% of the entire network?<p>Can this organization exploit the network by mining the majority of blocks to invalidate some transactions or in some other way?
Great introduction to the math/comp sci behind it, and I'm not sure if I missed it but I am wondering how nodes get in contact with each other.<p>As it is decentralized, it isn't obvious how the network knows about itself.