Privacy transaction method and system, device and storage medium

Abstract

The invention provides a privacy transaction method and system, a device and a storage medium. The method comprises: obtaining a first public key pair of a receiver, generating a first random number,generating an elliptic curve public key according to the first random number, and generating a one-time public key according to the first random number; using the one-time public key as the output destination public key of the privacy transaction, using the elliptic curve public key as the input information of the privacy transaction, and packaging the privacy transaction according to the balanceof the privacy contract. The privacy transaction is sent to the block chain network for consensus, and the receiver verifies the privacy transactions, and generates a one-time private key according tothe first private key pair and the elliptic curve public key after the verification is passed. By using the public key pair to generate the one-time target public key, the receiver is guaranteed notto be traced by others.

Description

technical field [0001] The present application relates to the field of computer technology, and in particular to a private transaction method, system, device and storage medium. Background technique [0002] Most of the transactions of the existing blockchain systems will be publicly stored on the blockchain, and anyone can view the relevant information of the transaction on the blockchain. It will not be completely anonymous, and it will not be very good. To achieve non-connectivity (tracking the destination), such transactions cannot guarantee privacy very well. The method mentioned in the patent CN201611107703 scheme uses the account model, and the attacker can easily scan the state changes of all existing accounts to track related transactions. At the same time, using a one-time account address as the account address of the blockchain system will lead to random With more and more transactions in the system, many cold accounts are generated, which wastes unnecessary stor...

AI Technical Summary

Problems solved by technology

[0002] Most of the transactions of the existing blockchain systems will be publicly stored on the blockchain, and anyone can view the relevant information of the transaction on the blockchain. It will not be completely anonymous, and it will not be very good. To achieve non-connectivity (tracking the destination), such transactions cannot guarantee privacy very well

The method mentioned in the patent CN201611107703 scheme uses the account model, and the attacker can easily scan the state changes of all existing accounts to track related transactions. At the same time, using a one-time account address as the account address of the blockchain system will lead to random With more and more transactions in the system, many cold accounts are generated, which wastes unnecessary storage resources and computing resources

Moreover, the existing transfer methods can only be carried out in the form of UTXO to UTXO, or transactions between account models and account models, but transactions between account models and UTXO models cannot be realized.

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