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The Mini-Blockchain Scheme

Almost all P2P crypto-currencies prevent double spending and similar such attacks with a bulky “blockchain” scheme,and the ones which do not typically use some sort of pseudo-decentralized solution to manage the transactions. Here we propose a purely P2P crypto-currency scheme where old transactions can be forgotten by the network. Since nodes only require the newest portion of the blockchain in order to sync with the network,we call this portion of the chain the “mini-blockchain”. We argue that the loss of security this trimming process incurs can be solved with a small “proof chain” and the loss of coin ownership data is solved with a database which holds the balance of all non-empty addresses,dubbed the “account tree”. The proof chain secures the miniblockchain and the mini-blockchain secures the account tree. This paper will describe the way in which these three mechanisms can work together to form a system which provides a high level of integrity and security,yet is much slimmer than all other purely P2P currencies. It also offers other potential benefits such as faster transactions and lower fees,quicker network synchronization,support for high levels of traffic,more block space for custom messages,and potentially even increased anonymity.


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