Abstract: Embodiments of the present disclosure provide methods and apparatuses for blockchain-based multi-party computation, a device and a medium, relate to blockchain technology in the field of computer technology. An embodiment of the method can include: encrypting business data, to obtain a ciphertext of the business data; hashing the ciphertext of the business data, to obtain a hash result of the business data; sending the hash result of the business data to a blockchain node, so that the blockchain node writes the hash result of the business data into a blockchain; and sending the ciphertext of the business data to a target trusted computing module in a target server, for instructing the target trusted computing module to perform multi-party computation based on the ciphertext of the business data and the hash result of the business data in the blockchain.

Abstract: Provided are a data storage method, a device, and a storage medium. The implementation scheme is as follows: target data to be stored is divided into data fragment original texts, and storage nodes are allocated for the data fragment original texts; in a trusted execution environment, the data fragment original texts are encrypted according to node information of the storage nodes to obtain data fragment cipher texts associated with the storage nodes; and the data fragment cipher texts are stored to the storage nodes.

Abstract: Embodiments of the present disclosure provide a privacy transaction processing method, an electronic device and a storage medium, and relates to a field of blockchain technologies. The method includes: obtaining a business transaction request to be executed; if the business transaction request is a privacy business transaction request, obtaining a corresponding privacy key, in which the privacy key is an organization privacy key of a privacy organization to which the privacy business transaction request belongs; decrypting and executing the privacy business transaction request according to the privacy key to generate privacy business transaction data, in which the privacy business transaction data comprises at least associated information of privacy content data and the privacy business transaction request; and storing the privacy business transaction data in a blockchain, and storing the privacy content data locally.

Abstract: Provided are a trusted environment remote verification method and apparatus, a device, a system, and a medium. The implementation is as follows: in response to a remote verification request of a verification demander, performing local verification on a target enclave through a verification program of the verifier; and signing a local verification result through a first key of the verification program, and feeding back the signed local verification result to the verification demander to enable the verification demander to perform the following operations: performing signature verification on the signed local verification result according to a second key associated with the first key, and determining a remote verification result of the target enclave according to a signature verification result.

Abstract: Embodiments of the present disclosure provide methods and apparatuses for blockchain-based multi-party computation, a device and a medium, relate to blockchain technology in the field of computer technology. An embodiment of the method can include: encrypting business data, to obtain a ciphertext of the business data; hashing the ciphertext of the business data, to obtain a hash result of the business data; sending the hash result of the business data to a blockchain node, so that the blockchain node writes the hash result of the business data into a blockchain; and sending the ciphertext of the business data to a target trusted computing module in a target server, for instructing the target trusted computing module to perform multi-party computation based on the ciphertext of the business data and the hash result of the business data in the blockchain.

Abstract: Embodiments of the present disclosure provide a privacy transaction processing method, an electronic device and a storage medium, and relates to a field of blockchain technologies. The method includes: obtaining a business transaction request to be executed; if the business transaction request is a privacy business transaction request, obtaining a corresponding privacy key, in which the privacy key is an organization privacy key of a privacy organization to which the privacy business transaction request belongs; decrypting and executing the privacy business transaction request according to the privacy key to generate privacy business transaction data, in which the privacy business transaction data comprises at least associated information of privacy content data and the privacy business transaction request; and storing the privacy business transaction data in a blockchain, and storing the privacy content data locally.

Abstract: A method and an electronic device for supporting artificial participation in decision-making of blockchain, by receiving feedback information inputted by the user in the node and broadcasting the feedback information to other nodes for performing decision-making processing, enable a user to initiate and participate in voting through a node of the blockchain, and avoid restrictions on decision-making initiation and participation, while avoiding dependence on the network and improving stability.

Abstract: Embodiments of the present disclosure disclose a smart contract upgrade method and system based on an alliance chain. The smart contract upgrade method includes: receiving an upgrade transaction submitted through an alliance chain invocation interface; performing a verification on the upgrade transaction in order to verify whether the update transaction is initiated by a creator of an original smart contract through an authorization node; and submitting the upgrade transaction to the alliance chain, when a verification result is that the upgrade transaction is initiated by the creator of the original smart contract through the authorization node, so that the alliance chain receives and executes the upgrade transaction, and writes an execution code of a new smart contract into a storage location of the corresponding original smart contract.