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

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...

AI Technical Summary

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 user by the lazy server, the present invention discloses a security modulus index outsourcing method under a single malicious cloud server , and discloses a system implementing this approach

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