jewelry making wholesale canada What is a 51%computing power attack in the blockchain?

wholesale western jewelry usa In the Bitcoin White Paper, there has been such a expression: the sum of the computing power of honest nodes, which is greater than the sum of the computing power of attackers with cooperative relationships. The system is safe.
The computing power controlled by a malicious node in the system, exceeding the computing power controlled by honest nodes, the system is the risk of being attacked. This attack that controls more than 50%of the computing power of malicious nodes is called 51%computing power attack (51%Attack).
Mas a cryptocurrency system may encounter 51%of the risk of computing power attack? In fact, it is not. Only the cryptocurrency based on the POW (workload certificate) consensus mechanism has 51%computing power attack, such as Bitcoin, bit cash, and the current stage of Ethereum; There are no 51%computing power attacks, such as EOS, TRON, etc. based on DPOS (Certificate of Entrusted Rights).
After understanding the 51%computing power attack, you must be curious what bad things such attacks can do.
1, double spending. Shuanghua means a "money" twice or even many times.
51%of the computing power attack is double flower? Assuming that Xiao Hei has 666bTC, he paid the big white of these currencies at the same time, and also issued these coins to his other wallet address. In other words, Xiao Hei's money is transferred to two people at the same time. In the end, the transaction sent to Dabai was first confirmed and packed in a block with a block height.
At this time, the small black of more than 50%of the computing power was controlled, and 51%computing power attack was launched. By re -assembling the nn block, he will package his transaction into the block and continue to extend the block on this chain. Due to the advantages of the computing power, this amount will become the longest legal chain. Such a small black 666BTC dual flower was successful, and the 666BTC "flying" in the big white wallet was missing ".
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