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What is the Race Attack in BlockChain?

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The Race Attack requires the recipients to accept unconfirmed transactions as payment. As an attacker, you can send the same coin to different vendors by using the two different machines. If the vendors deliver the things without waiting for block confirmation, they will soon realize that the transaction was rejected during the mining process. The solution to this is that the vendor must wait for at least one block confirmation before sending things.

This attack is easier to pull off when the attacker has a direct connection to the victim's node. Therefore it is recommended to turn off incoming connections to nodes for receiving payments so that your node will identify their own peers. And it does not allow the payer to submit the payment to the payee directly.

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