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Method and device for obtaining input of secure multi-party computing protocol

A technology for secure multi-party computation and protocol, applied in the field of cryptography, which can solve the problem of too many computing and storage resources

Active Publication Date: 2020-11-03
ADVANCED NEW TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process requires powerful zero-knowledge proof technology, which requires more computing and storage resources

Method used

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  • Method and device for obtaining input of secure multi-party computing protocol
  • Method and device for obtaining input of secure multi-party computing protocol
  • Method and device for obtaining input of secure multi-party computing protocol

Examples

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Embodiment Construction

[0118] Embodiments of this specification will be described below with reference to the accompanying drawings.

[0119] figure 1 A schematic diagram of a scenario of secure multi-party computing according to an embodiment of this specification is shown. Such as figure 1 As shown, the participants in the secure multi-party computing include a first server end 11 and a third server end 13, the first server end 11 is the prover server end, and the prover is, for example, an individual, an enterprise, an organization, etc., and the third server end 13 is On the verifier server side, the verifier can be an individual, enterprise, organization, etc. that provide services to the prover. This scenario also includes a second server end 12, which is, for example, a server end of an authoritative organization such as a bank or a tax bureau, in which the data of the certifying party is stored. Before the first server end 11 and the third server end 13 execute the secure multi-party comp...

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Abstract

The embodiment of this specification provides a method and device for obtaining the input of the secure multi-party computing protocol. The participants of the secure multi-party computing protocol include the first server end, and the first server end is the server end of the first object. The secure multi-party computing protocol is based on The first data of the first object is calculated, wherein the first data is stored in the second server end, the second server end is the server end of the authority, and the method is executed on the second server end, including: from the first The server receives a data request for the first data; based on the data request, homomorphically encrypts the first data with a public key previously received from the first server to generate a first ciphertext, wherein the public key is the first ciphertext A homomorphic encryption public key of an object; obtaining verification data based on the first ciphertext, and the verification data is used to verify whether the ciphertext to be verified corresponds to the first data; and sending the verification data to the first server.

Description

technical field [0001] The embodiments of this specification relate to the technical field of cryptography, and more specifically, to a method and an apparatus for obtaining an input of a secure multi-party computing protocol. Background technique [0002] An entity (individual or enterprise, organization) usually needs to provide its own private data (age, deposit, gender, income) to another entity (or multiple entities or even the public) when applying for loans, applying for visas, tax returns, etc. , for calculation / evaluation by another entity (or entities or even the public). The former entity may be called a prover, and the latter entity may be called a verifier. The proving party may lie when providing data, so one or more entities (endorsers) are required to provide proof, such as a deposit certificate provided by a bank endorser, an ID card / business license provided by a government endorser, etc. [0003] When the prover submits its private data to the verifier f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/00H04L29/06
CPCH04L63/0428H04L9/008H04L2209/46H04L2209/16H04L9/3247H04L9/3239H04L9/50G06F21/602H04L9/0643
Inventor 李漓春殷山刘正
Owner ADVANCED NEW TECH CO LTD
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