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Processing method and device for linear homomorphic signature

A processing method and homomorphic technology, applied in the computer field, can solve the problem of low security of homomorphic signature algorithm

Active Publication Date: 2018-10-30
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Embodiments of the present invention provide a method and device for processing linear homomorphic signatures to solve the problem of low security of homomorphic signature algorithms in the case of a single source point

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  • Processing method and device for linear homomorphic signature
  • Processing method and device for linear homomorphic signature
  • Processing method and device for linear homomorphic signature

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Embodiment Construction

[0105] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0106] figure 1 It is a flowchart of an embodiment of the method for processing linear homomorphic signatures of the present invention, such as figure 1 As shown, the method of the present embodiment includes:

[0107] Step 101. According to the security parameters and the size of the data set, the user terminal uses the algorithm TrapG...

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Abstract

Provided are a method and device for processing a linear homomorphic signature. The method comprises: according to a security parameter and the size of a data set, conducting, by a user terminal, a calculation using an algorithm TrapGen()to acquire a matrix and an integer lattice corresponding to the matrix (101); according to a tag of the data set, conducting a calculation to acquire an expansion lattice corresponding to the integer lattice (102); according to a generating basis of the integer lattice, conducting a calculation to acquire a generating basis of the expansion lattice (103); and according to the integer lattice, the expansion lattice and the generating basis of the expansion lattice, acquiring a signature corresponding to the data set, and transmitting the data set and the corresponding signature to a server for the server to save same (104).

Description

technical field [0001] The embodiments of the present invention relate to computer technology, and in particular to a method and device for processing linear homomorphic signatures. Background technique [0002] The linear homomorphic signature technique refers to a set of k n-dimensional finite fields F p vector v on 1 ,...,v k To sign, each vector gets a signature. The linear homomorphic property is that given these k signatures, anyone can generate the linear space Span{v generated by these k vectors 1 ,...,v k} in the signature of any vector v. In addition, its security means that it is difficult to generate a linear space Span{v 1 ,...,v k} the signature of any vector v out there. [0003] At present, the linear homomorphic signature technology includes the homomorphic signature algorithm under the random model (the Hash function is regarded as a random oracle machine). In addition, the homomorphic signature algorithm in the case of a single source point belong...

Claims

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Application Information

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IPC IPC(8): H04L9/32H04L29/06
CPCH04L9/32
Inventor 陈文彬雷浩
Owner HUAWEI TECH CO LTD
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