Title:
SECURITY PROCESSING METHOD AND APPARATUS FOR PRIVACY VECTOR
Document Type and Number:
WIPO Patent Application WO/2023/240934
Kind Code:
A1
Abstract:
Provided in the embodiments of the present description are a security processing method and apparatus for a privacy vector, which method and apparatus are implemented by using secure muti-party computation. The method comprises: acquiring a present-party fragment of a privacy vector in a modulus-2 space; accumulating all bits of the present-party fragment to obtain a first summation result; determining a first sign bit according to an index corresponding to a present party; determining a first fragment of a first scalar according to the first summation result and the first sign bit; locally calculating an inner product of the present-party fragment and a plaintext vector, so as to obtain a second summation result; determining a first fragment of a second scalar according to the second summation result and the first sign bit; and jointly performing secure multiplication on the basis of the first fragment of the first scalar, the first fragment of the second scalar, and a second fragment of the first scalar and a second fragment of the second scalar, which are provided by an opposite party, so as to obtain a first fragment of a vector inner product result, wherein the vector inner product result corresponds to a product of the first scalar and the second scalar. Therefore, the communication volume can be reduced in security processing for a privacy vector.
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Inventors:
LI LICHUN (CN)
ZHANG QIZHI (CN)
ZHANG QIZHI (CN)
Application Number:
PCT/CN2022/135285
Publication Date:
December 21, 2023
Filing Date:
November 30, 2022
Export Citation:
Assignee:
ANT BLOCKCHAIN TECH SHANGHAI CO LTD (CN)
International Classes:
H04L9/08
Foreign References:
| CN114978510A | 2022-08-30 | |||
| CN111885079A | 2020-11-03 | |||
| CN113098687A | 2021-07-09 | |||
| US20180307859A1 | 2018-10-25 |
Attorney, Agent or Firm:
E-TONE INTELLECTUAL PROPERTY FIRM (GENERAL PARTNERSHIP) (CN)
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