Data processing method and device and device for data processing

A data processing and data technology, applied in the computer field, can solve the problem of low efficiency of ciphertext

Active Publication Date: 2021-01-19
HUAKONG TSINGJIAO INFORMATION SCI BEIJING LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, if the ciphertext data to be compared is 64 bits, it takes 64 rounds of communication to get the comparison result, resulting in low efficiency of ciphertext comparison

Method used

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  • Data processing method and device and device for data processing
  • Data processing method and device and device for data processing
  • Data processing method and device and device for data processing

Examples

Experimental program
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Embodiment Construction

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0025] method embodiment

[0026] refer to figure 1 , shows a flow chart of the steps of an embodiment of a data processing method of the present application, the method is used to compare the sizes of ciphertext data x and ciphertext data y in a system that supports ciphertext bit operations, and the method specifically May include the following steps:

[0027] Step 101, respectively decomposing x and y into n-bit ciphertext bits based on the ciphertext;

[0028] Step ...

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Abstract

The embodiment of the invention provides a data processing method and device and a device for data processing. The data processing method and device are used for comparing the size of ciphertext datax with the size of ciphertext data y in a system supporting ciphertext bit operation. The method comprises the steps of decomposing x and y into n ciphertext bits based on a ciphertext; inputting then-bit ciphertext bit corresponding to x and the n-bit ciphertext bit corresponding to y into a comparison circuit for iterative computation, performing parallel computation on possible output values of ciphertext bit computation of each corresponding bit of x and y in the first round of iteration, and performing parallel computation in the next round of iteration by utilizing the possible output values, and obtaining a possible output value calculated by the ciphertext bit of each corresponding bit of x and y in the next round of iteration until the log2 (n) + 1 round of iteration calculationis completed to obtain a comparison result of x and y, wherein the possible output value and the comparison result are ciphertexts. According to the embodiment of the invention, the number of communication rounds required by ciphertext comparison operation can be reduced, and thus the ciphertext comparison efficiency can be improved.

Description

technical field [0001] The present application relates to the field of computer technology, and in particular to a data processing method, device and device for data processing. Background technique [0002] The MPC (Secure Multi-Party Computation, multi-party secure computing) system is used to solve the computing problem of multi-party collaboration in a secure manner without a trusted third party. The multi-party secure computing system requires the input data to be in the state of ciphertext, that is, in a distributed network, multiple participating entities each hold secret inputs, and all parties hope to jointly complete the calculation of a function, and each participating entity is required to divide the calculation No input from other participating entities will be available outside of the results. [0003] The multi-party secure computing system requires the data to be in the ciphertext state, and calculations are performed on the ciphertext, for example, the size...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F7/02H04L9/00
CPCG06F7/02H04L9/00H04L2209/12H04L2209/122H04L2209/125
Inventor 李艺
Owner HUAKONG TSINGJIAO INFORMATION SCI BEIJING LTD
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