Abstract: Embodiments of this application disclose a blockchain key-based data processing method and apparatus. The method includes obtaining communication channels respectively communicating with N clients, and respectively performing key shard negotiation with the N clients to obtain a local private key shard and a complete public key; receiving signature requests transmitted by M?1 clients in the N clients, and obtaining identity association information in the M?1 signature requests; if the identity association information in the M?1 signature requests is legitimate identity information, determining a client that is in the M?1 clients as a target client, and obtaining service execution data associated with the target client; and if the service execution data conforms to a risk management policy corresponding to identity association information of the target client, jointly participating in joint signature processing on the blockchain service with the M?1 clients.

Abstract: This application discloses a message processing method and apparatus, a product, a device, and a medium. The method is applicable to a first client, and includes: obtaining N pieces of shard information of a client key of a second client, each piece of shard information being processed by one corresponding shard processing device, and the second client being disposed on a shard processing device; obtaining a message topic configured at a relay cluster by each shard processing device; generating a configuration message of each shard processing device according to the shard information corresponding to each shard processing device and the message topic configured by each shard processing device; and transmitting the generated N configuration messages to the relay cluster, to enable each shard processing device to obtain the respective configuration message from the relay cluster and process the corresponding shard information based on the respective configuration message.

Abstract: A data processing method performed by a first device includes: generating, in response to first service data satisfying a data uploading condition, a first bit array corresponding to the first service data; encrypting the first bit array through a data key to obtain a ciphertext bit array, the data key being generated by a second device in a data intersection application run in a trusted execution environment of the second device; and transmitting the ciphertext bit array to a blockchain node for forwarding to a second device, for the second device to decrypt, in the data intersection application through the data key, the ciphertext bit array to obtain the first bit array.

Abstract: A blockchain data processing method is performed by an electronic device. The method includes: packaging a local consensus transaction, a main chain binding height, and a main chain read dataset into a local consensus block; broadcasting the local consensus block to a local verification node, where the local verification node is configured to obtain obtaining a voting consensus result corresponding to a transaction execution result of the local consensus transaction when a synchronized block height is greater than or equal to the main chain binding height, and a synchronized read dataset is consistent with the main chain read dataset; and uploading, when determining that consensus is reached based on the voting consensus result returned by the local verification node, the local consensus block to a local consensus sub-chain corresponding to a local consensus network.

Abstract: This application provides a data processing method, a computer device, and a medium. The method is applied to a terminal device including a first client. The first client has a public client key and a private client key. The first client stores encrypted data that is obtained by encrypting the private client key according to an object password. The method includes receiving the object password; decrypting the encrypted data by using the received object password to obtain the private client key; signing the encrypted data based on the private client key to obtain a signature of the encrypted data; and transmitting the public client key, the encrypted data, and the signature of the encrypted data to a cloud device of the first client, the cloud device storing the encrypted data after verifying the encrypted data based on the public client key and the signature of the encrypted data.

Abstract: A blockchain data processing method is performed by an electronic device. The method includes: packaging a local consensus transaction, a main chain binding height, and a main chain read dataset into a local consensus block; broadcasting the local consensus block to a local verification node, where the local verification node is configured to obtain obtaining a voting consensus result corresponding to a transaction execution result of the local consensus transaction when a synchronized block height is greater than or equal to the main chain binding height, and a synchronized read dataset is consistent with the main chain read dataset; and uploading, when determining that consensus is reached based on the voting consensus result returned by the local verification node, the local consensus block to a local consensus sub-chain corresponding to a local consensus network.

Abstract: A data processing method performed by a first device includes: generating, in response to first service data satisfying a data uploading condition, a first bit array corresponding to the first service data; encrypting the first bit array through a data key to obtain a ciphertext bit array, the data key being generated by a second device in a data intersection application run in a trusted execution environment of the second device; and transmitting the ciphertext bit array to a blockchain node for forwarding to a second device, for the second device to decrypt, in the data intersection application through the data key, the ciphertext bit array to obtain the first bit array.