Anonymous secure payment channel method and device

Abstract

The invention discloses an anonymous secure payment channel method and a device, and the method comprises the steps: enabling two transaction parties to communicate on the Internet, determining the willingness of a transaction, selecting a path, determining a transaction man-in-the-middle, and building deployment intelligent contracts with the transaction man-in-the-middle, so as to build a channel; transmitting a virtual channel opening certificate between the two transaction parties and the transfer intermediary; controlling two transaction parties to perform transaction, and sending transaction certificates to each other; sending a final result of a transaction to a transaction intermediary through a first transaction user; and performing calculation by the transaction intermediary, sending a blind signature certificate for closing settlement to the first transaction user after confirmation, performing exchange with a certificate for closing the channel with the first transaction user, and the first transaction user carries out blind removal processing on the received blind signature certificate and forwards the blind signature certificate to the second transaction user for closing the channel. The method can realize non-linkable identities of both parties in a transaction process, and is suitable for most blockchain networks supporting smart contracts.

Description

technical field [0001] The invention relates to the technical field of computer technology application, in particular to an anonymous safe payment channel method and device. Background technique [0002] Through distributed ledger technology, blockchain transactions do not need to rely on third-party trusted institutions, and establish extensive trust in the decentralized network. Various derivative security payment systems based on blockchain technology have gradually become the basis for future transactions. new ideas. However, the blockchain faces technical bottlenecks, which are mainly reflected in two aspects: insufficient scalability and lack of privacy protection mechanisms. [0003] First, the scalability of the blockchain is poor, which is manifested in low transaction efficiency and insufficient throughput of the blockchain network. For example, Bitcoin, whose underlying design only supports 7 transactions per second, is far slower than traditional financial tran...

AI Technical Summary

Problems solved by technology

[0011] However, the existing payment channels still face many problems

In the traditional peer-to-peer payment channel model, when there are a large number of users in general, the establishment of payment channels in pairs will still cause a large amount of blockchain transaction submissions, and the burden on the blockchain is still very large

After the introduction of a third party or middleman, such as the virtual payment channel model, the length of the transaction is increased, and even the payment channel network is built to cover more users, which actually reduces the transaction volume submitted to the blockchain; but the virtual payment channel is still The problem of anonymity is not solved. The actual trader identities of the start and end are visible to the intermediate nodes from beginning to end, but the details of the micro-transactions are hidden, which basically has no privacy protection for identities.

Based on this, someone proposed to use blind signatures combined with smart contracts for transactions. By using the blind signature of the middleman as a "credential", the "credential" is still valid after de-blinding, and the payee holds this credential to exchange the amount with the middleman. Eliminates the connection between the two parties to the third-party intermediary, but it is limited to a single transaction, the protocol structure is too simple, and the payment amount is always fixed and cannot be changed, resulting in narrow practical application scenarios, and can only achieve a single transfer of quota , can hardly be used for normal trading behavior

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