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The Bitcoin Backbone Protocol – Beginners Guide

Eseandre Mordi

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Cryptocurrency is a type of a virtual digital currency that uses cryptography to secure its transactions and is decentralized. Bitcoin, on the other hand, was the first Cryptocurrency founded in the year 2009 by an unknown source as open source software. The transactions are peer to peer and are verified through network nodes. Cryptocurrency exchange is businesses that give people chance or opportunity to exchange Cryptocurrency with other goods, product or even services.

The Blockchain

The blockchain is a public transaction ledger which was to affect the decentralization of the Bitcoin system more so in preventing double spending. The ledger is maintained by miners who are anonymous participants whose work is to approve transactions and in turn, are rewarded with bitcoins. Blockchain requires miners to solve a cryptographic puzzle in order to generate a new blockchain.

Bitcoin Protocol

The bitcoin protocol is a set of rules or regulations that govern Cryptocurrency exchange; the main problem facing the exchange is double-spending. Double spending occurs when the fraudster credits an account receives the services or the goods agreed upon and manages to organize the Blockchain so that the transaction is reverted. At this point, the fraudster keeps the bitcoins as well as receives the goods or services.

Analyzing the bitcoin protocol also referred to as bitcoin backbone, the protocol is executed by key players who ensure the running and maintenance of the Blockchain. The blockchain is parameterized in three external functions content validate predicate (V); input contributes function (I) and chain reading function (R). (V) Provides the proper structure information (I) specifies how the content of the Blockchain is formed by the players and (R) determines how the blockchain is supposed to be interpreted.

Glaring Anonymity

Players participating in the transactions cannot authorize the transactions themselves and therefore its difficult for them to know the source of the message and therefore there is a need for a third party to create a POW (proof of work). There are two types of players during a cryptocurrency exchange the honest player and the adversary players, both have hash power during the transaction but the adversary has half the power the honest players have in the transaction. In case one of the honest parties cuts off a transaction during the transaction there might be chances the hash power of the fraudster might increase and surpass that of the second honest party. The parameters of the blockchain are parameterized in that (t) is the value of the adversary and (n) is the number of players. The representation of the share of the hash power is t/n-t < 1.

Authenticity

Also, the BA (Byzantine Agreement) is built on the terms of the bitcoin backbone protocol and is based o the POW assumption. Every Blockchain has its participants and each participant is required to give an input into the Blockchain and a Blockchain becomes authentic only if it contains {0, 1}. When the blockchain reaches sufficient lengths the honest parties read the k elements at the end by pruning and retaining the remaining as part of the blockchain. This ensures the majority of the blockchain originate from the honest parties.

The best cryptocurrency is one which is decentralized, this means there is no central control/authority of the transactions it should also know when to produce new cryptocurrencies and when not to and lastly should be able to distinguish ownership between different players.

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