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hi everybody my name is ted and today i'm going to be presenting our work to our blockchain combining proof of work and bluestacks clearly um this is your work with lay friend journey 10 cares for thai let's first start with some introduction about blockchain and bitcoin in general so blockchain is defined as a distributed database that is used to maintain a continuously growing list of because call blocks bitcoin is an application of blockchain bitcoin was introduced by nakamura in 2009 it is maintained by provo work miners and the underlying contents of mechanisms and muppet guides called nakamura's consensus now let's take a look at how nakamura's consensus works as i mentioned before the blockchain is maintained by a network of miners these miners are connected by a semi-single network each of them will locally stop a copy of the blockchain and they will work together to maintain the blockchain including storing and adding new transactions to the chain this day we have alice she wants to send some money to offend bob so how is this transaction added to the chain and how does everybody agree on this transaction um to get everyone to agree on this generation we need to find a leader and this leader will decide whether or not to add this transaction to the chain but how how do we choose a leader um this this question is not a very simple question but nakamura answered this question in a very simple and elegant way so let's just give everybody a puzzle and the person who solves the problem first will be the leader who get to add the transactions creating new blocks to the blockchain this puzzle is called probable puzzles and it is simplified to this harsh university you can see that the inputs of this hash inequality includes the last block of the blockchain which is the block p5 transaction and a randomness so the random one is actually the the puzzle solution the minus need to find a random noun so that the output the outcome of this hash function on the inputs should be less than some difficulty target t because the last blob and the standardization are public and known to other miners so even minor solution other can easily verify it because the hash function is unpredictable so no one can predict the outcome of the hash function no one can play it without actually hashing the inputs we're actually doing the work so the only way to find the solution is to try every possible lens here is a minor file solution here include a new block including the sensation and the solution and he will send the new block to other miners in the network one of the primary concerns of any cryptocurrency is the issue of double spending i always could attempt to spend her money twice in two separate transactions these two transactions will then be included in two different...