Safe mode index outsourcing method and system under single malicious cloud server

A cloud server, modular index technology, applied in the field of cloud computing, can solve problems such as low verifiability and inability to find lazy servers to deceive users.

Active Publication Date: 2015-12-02
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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Problems solved by technology

[0007] Aiming at technical problems such as the low verifiability of the single-server modulus index outsourcing method in the prior art, and the inability to discover the deception of the u

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  • Safe mode index outsourcing method and system under single malicious cloud server
  • Safe mode index outsourcing method and system under single malicious cloud server
  • Safe mode index outsourcing method and system under single malicious cloud server

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Embodiment Construction

[0031] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] Suppose p, q are two large prime numbers, q|p-1, and u q = 1modp, giving an arbitrary exponent and base calculate u a modp, which requires the values ​​of a and u to be kept secret from U during the outsourced computation. This is a requirement of the security model index outsourcing method, which belongs to the existing general requirements, and will not be described in detail here.

[0033] Such as figure 1 A schematic diagram of the system architecture of the outsourcing modulo index method of the present invention is shown. There are three participating parties in the present invention: the subroutine Rand, the user T, and the malicious cloud server U.

[0034] Subroutine Rand: Each call can honestly return a form (k,g k ), the computational efficiency can be improved by calling Rand.

[0035] Malicious cloud...

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Abstract

The invention discloses a safe mode index outsourcing method and a safe mode index outsourcing system under a single malicious cloud server. The method comprises the steps as follows: step1, a user T calls a sub-program Rand for six times to obtain six random pairs; step 2, the user T splits a mode index which needs to calculate according to the random pairs returned by the sub-program Rand, and simultaneously, the user T selects a random value r and multiplies the index of the mode index by r to obtain a new mode index, and splits the new mode index; step 3, the user T requests a server U to separately calculate the values which needs to calculate after splitting; step 4, the user T multiplies a random value which is related to ua and which is remained by the T by a result which is related to the ua and which is returned by the server U, and multiplies the results for r times to obtain a verification result 1; and the user T multiplies a random value which is related to ura and which is remained by the T by a result which is related to the ura and which is returned by the server U to obtain a verification result 2; comparing the result 1 and the result 2, and judging that the server could accurately perform calculation if the result 1 and the result 2 are equal to each other.

Description

technical field [0001] The invention relates to the technical field of cloud computing, in particular to a method and system for outsourcing security modulus index under a single malicious cloud server. Background technique [0002] In recent years, cloud computing has developed rapidly in the IT field and has good applications in the field of industrial technology, bringing great hope to solve the problem of limited computing resources. In the cloud environment, outsourced computing allows users with limited resources to choose to outsource tedious computing tasks to servers with abundant computing resources for a fee. However, outsourcing means that the control of user data is transferred from itself to the cloud service provider, which inevitably creates new security issues: first, some privacy of users may be leaked; second, the server may also due to various reasons The calculation is not done correctly, causing huge losses to the user. [0003] First of all, in order...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L29/08
CPCH04L63/123H04L67/10
Inventor 叶俊吴树林张金山魏正曦李科刘勇
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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