IP signature is a technical means to authenticate and protect the integrity of data packets in network communication. In network communication, each data packet carries information such as source IP address and destination IP address, but these information cannot directly prove the authenticity and integrity of the data packet. In order to ensure the reliability of the source of the data packet and prevent the data packet from being tampered with during transmission, IP signature technology can be used. IP signature generates a digital signature by encrypting and verifying the data packet and adds it to the data packet. After receiving the data packet, the receiver can use the same algorithm to decrypt and verify the data packet to verify the validity of the digital signature.