Data processing method and apparatus, device, and storage medium

A data processing method, performed by a second service node in a blockchain network, the method comprising:

• receiving service data information transmitted by a first service node in the blockchain network;
• generating, based on a node private key of the second service node and the service data information, a random parameter used for performing signature processing on the service data information;
• generating a first key parameter based on the random parameter and a fixed parameter, generating a second key parameter based on the random parameter, the service data information, and the node private key, and determining data signature information based on the first key parameter and the second key parameter;
• and
• transmitting the data signature information to the first service node.

A data processing apparatus, comprising:

• a processor and a memory,
• the processor being connected to the memory, the memory being configured to store a computer program, and the processor being configured to invoke the computer program, to cause the computer device to perform:
• obtaining service data information, and transmitting the service data information to a second service node, the second service node being a node other than the first service node in the blockchain network;
• receiving data signature information returned by the second service node, the data signature information being obtained by the second service node through performing signature processing on the service data information;
• the data signature information comprising a first key parameter and a second key parameter that are both related to a random parameter;
• the random parameter being determined by the second service node based on both a node private key and the service data information;
• performing signature verification on the data signature information based on the first key parameter and the second key parameter in the data signature information, to obtain a signature verification result, and adding the signature verification result to a verification result set associated with the blockchain network;
• searching for a signature verification result that satisfies a valid signature verification condition from the verification result set, and determining the signature verification result that satisfies the valid signature verification condition as a target signature verification result;
• and
• performing aggregate signature on the data signature information corresponding to the target signature verification result when a quantity of signatures of the target signature verification result satisfies an aggregate signature condition.