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Contract calling method and device

A contract and call request technology, applied in the field of verifiable computing, can solve problems such as performance loss

Active Publication Date: 2020-05-01
ALIPAY (HANGZHOU) INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In related technologies, to meet the privacy requirements in various scenarios, one way is to achieve privacy protection through encryption technologies such as homomorphic encryption (Homomorphic encryption) and zero-knowledge proof (Zero-knowledge proof), but it also brings serious performance loss

Method used

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  • Contract calling method and device
  • Contract calling method and device

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Embodiment Construction

[0080] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. Implementations described in the following exemplary embodiments do not represent all implementations consistent with one or more embodiments of this specification. Rather, they are merely examples of apparatuses and methods consistent with aspects of one or more embodiments of the present specification as recited in the appended claims.

[0081] It should be noted that in other embodiments, the steps of the corresponding methods are not necessarily performed in the order shown and described in this specification. In some other embodiments, the method may include more or less steps than those described in this specification. In addition, a single step described in this...

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Abstract

One or more embodiments of the invention provide a contract calling method and device. The method comprises the steps that an off-chain private calculation node receives an encrypted calling request,and decrypts the encrypted calling request in an off-chain trusted execution environment to obtain the recognition information of an off-chain contract and the information of incoming parameter data contained in the calling request; the off-chain privacy calculation node calls a pre-deployed byte code of the off-chain contract according to the recognition information, and executes the byte code through a virtual machine deployed in the off-chain trusted execution environment so as to perform off-chain privacy calculation on the entry parameter data; and the off-chain privacy calculation node encrypts the obtained off-chain privacy calculation result in the off-chain trusted execution environment and feeds back the encrypted off-chain privacy calculation result. Through the technical schemeof the specification, privacy protection can be realized in the contract calling process.

Description

technical field [0001] One or more embodiments of this specification relate to the technical field of verifiable computing, and in particular to a method and device for invoking a contract. Background technique [0002] In related technologies, to meet the privacy requirements in various scenarios, one way is to achieve privacy protection through encryption technologies such as homomorphic encryption (Homomorphic encryption) and zero-knowledge proof (Zero-knowledge proof), but it also brings Serious performance loss. Trusted Execution Environment (TEE) is another solution. TEE can function as a black box in the hardware, and the code and data operating system layer executed in the TEE cannot be peeked at, and only the predefined interface in the code can operate on it. In terms of efficiency, due to the black-box nature of TEE, plaintext data is used for operations in TEE, rather than complex cryptographic operations in homomorphic encryption, and there is no loss in the e...

Claims

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Application Information

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IPC IPC(8): G06F21/60G06F21/62
CPCG06F21/602G06F21/6245
Inventor 吴行行邱鸿霖吴因佥
Owner ALIPAY (HANGZHOU) INFORMATION TECH CO LTD
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