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1. The NAT network address mapping technology was studied, and the public network address was mapped to the private network address.
2.The online fault detection technology was studied to check the operation status of nodes in Ulord system in real time.
1. Coding of balance mechanism between communication delay and data retransmission mechanism in UDFS network.
2. The influence of TEE on the performance of spatiotemporal proof algorithm was studied.
Some function modules of Ulord APP was adjusted.
Double Spending: A double Spending is an intentional fork in which a node with a lot of computing power sends a transaction request to buy an asset, and after receiving the asset makes another transaction to send itself the same amount of coins. By creating a fork block, the attacker places the original and forged transactions on the block and starts mining based on the fork. If the attacker has more than 50% computing power, double spending can eventually be successful at guaranteeing any block depth; If less than 50%, there is a partial chance of success.