Block chain hosting transaction method and system for multi-party collaborative privacy protection

A technology of privacy protection and transaction method, applied in the field of blockchain custody payment, it can solve the problems of the server becoming an attacker and user privacy leakage, etc., and achieve the effect of randomness, reducing the difficulty of analysis, and high randomness.

Pending Publication Date: 2022-05-31
潘林浪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this service method also requires users to provide a signature identifying identity information to a third-party organization, making the server an easy target for attackers, and there is still a risk of user privacy being leaked

Method used

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  • Block chain hosting transaction method and system for multi-party collaborative privacy protection
  • Block chain hosting transaction method and system for multi-party collaborative privacy protection
  • Block chain hosting transaction method and system for multi-party collaborative privacy protection

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Embodiment Construction

[0057] The technical solution of the present disclosure will be described in further detail below with reference to the drawings and embodiments.

[0058] The invention uses a threshold signature algorithm to share the group signature key with all legally registered members, and distributes the public secret to all network members in the form of private key fragments. The entrusted service requests a signature, and aggregates at the user node to obtain a threshold signature with multi-party collaborative protection effect. The hosting center cannot determine which signer is the requester subject of the service request, but it can always verify the authenticity of the threshold signature. In order to encourage more honest nodes to provide proxy signature services, digital currency can be paid to service providers according to the deposit ratio or a certain amount to form a benign transaction model.

[0059] A standard (t, n) threshold signature system signs a message that is r...

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PUM

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Abstract

The invention relates to a block chain trusteeship transaction method and system for multi-party collaborative privacy protection, and the method comprises the steps: initiating a deposit request to a trusteeship center through a user node, and enabling the trusteeship center to distribute a signature public key and identity information of a legally registered proxy signature service provider for the user node; then providing self-signature components for the user node by a service provider through negotiation, and aggregating the signature components which contain the self-signature of the user and are not less than a threshold number so as to obtain a threshold signature with a collaborative protection characteristic, so that the independent signature of the user node is completely hidden in the threshold signature; a personal signature of a user node is prevented from being directly exposed to a hosting center under the condition that a signature validity verification function is ensured, so that a digital currency input address and a signer identity cannot be associated; in addition, the trusteeship center isolates the user deposit transaction from the payment service fee transaction, and the deposit address of the user node is transparent to the service provider, so that the user anonymization is completely realized.

Description

technical field [0001] The present invention relates to block chain trusteeship payment technology, in particular to a block chain trusteeship transaction method and system for multi-party collaborative privacy protection. Background technique [0002] It is a common method of network attack to expose the real identity of users by constructing a transaction graph of the address chain for deanonymization. If any link address can be mapped to a user's real identity, then all past and future transactions involving the link address can be associated with the user, thus compromising the anonymity of honest users. [0003] By introducing a third party to mix user transactions that meet the fixed amount conditions, relying on a third-party server to complete the obfuscation process; CoinJoin and CoinShuffle do not require the participation of a third party, but generate a jointly created transaction by all participants, only Each participant has to complete an independent signatur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q20/38G06F21/62
CPCG06Q20/3825G06Q20/3829G06F21/6254
Inventor 潘林浪蔡少林王喜朋
Owner 潘林浪
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