术语加密货币用来描述通过区块链保证安全的多种同质化数字代币。加密货币始于比特币。比特币可以用于在双方之间转移价值而不必信任中间人。你只需信任比特币代码，而比特币代码是开源的并可以免费获得。 What Other variations of Harvard referencing exist? There is not "a single accurate way" to do Harvard referencing, and a lot of universities have their own individual a little bit diverse pointers ... https://vanitytron.org