Privacy transaction method and system, device and storage medium

Abstract

The invention provides a privacy transaction method and a system, a device and a storage medium. The method comprises: selecting a plurality of available first UTXOs in a privacy address according toa transfer amount, and requesting a plurality of second UTXOs from a block chain; selecting a plurality of available first UTXOs in the privacy address according to the transfer amount; acquiring a first public key pair of a receiver, generating a first random number, generating a second random number according to the first random number, and generating a one-time public key according to the firstrandom number; taking the one-time public key as the output destination public key of the privacy transaction, taking the second random number as the output information of the privacy transaction, and packaging a plurality of privacy transactions; each of the privacy transactions being sent to a block chain network for consensus through a plurality of ring signatures. The invention ensures the related information of the sender and the receiver by using the ring signature technology and the one-time target address, thereby realizing the unconnectedness and untraceability of the transaction.

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 unconnectability (tracking the destination) and untraceability (tracking the sender), such transactions cannot protect privacy 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, so that the blockchain system is not untraceable. At the same time, one-time addresses are used as The account address of the blockchain system will cause many cold accounts to be generated as th...

AI Technical Summary

Problems solved by technology

[0002] Most of the transactions of the existing blockchain systems are publicly stored on the blockchain, and anyone can view the relevant information of the transaction on the blockchain, which will not achieve complete anonymity and cannot be well To be unconnectable (tracking the destination) and untraceable (tracking the sender), such transactions cannot protect privacy well

The method mentioned in the patent CN201611107703 scheme uses the account model, and the attacker can easily scan the status changes of all existing accounts to track related transactions, which makes the blockchain system not untraceable. At the same time, one-time addresses are used as The account address of the blockchain system will lead to many cold accounts as the system has more and more transactions, wasting unnecessary storage resources and computing resources

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