Recovering encrypted transaction information in blockchain confidential transactions

摘要

Implementations of the present disclosure include receiving a content of a confidential transaction of a client node, by a consensus node of a blockchain network, wherein the content of the confidential transaction includes one or more commitment values of the confidential transaction generated by the client node by applying a cryptographic commitment scheme to transaction data of the confidential transaction, and encrypted transaction information generated by encrypting the transaction data using a secret key of the client node, wherein a secret key is obtained by the client node according to a threshold secret sharing scheme with a plurality of client nodes, and one or more zero-knowledge proofs of the transaction data; verifying that the confidential transaction is valid based on the content of the confidential transaction; and storing the encrypted transaction information on a blockchain of the blockchain network.