Node signature refers to a unique identifier or proof associated with a node in a blockchain network. Each node, which can be an individual participant’s computer or server, validates and relays transactions. The node signature ensures that the data processed by the node can be trusted and linked to its specific actions.When a node creates a block of transactions, it signs it with its signature, including cryptographic components that confirm the authenticity of the block. This means that other nodes can verify that the block was indeed created by that particular node and has not been tampered with.The integrity of the entire network relies on these signatures. They help maintain security by preventing malicious activities, ensuring that only valid and accurately reported transactions are added to the blockchain. Overall, node signatures play a key role in fostering trust and reliability in decentralized systems.