Secret data transmission protection method based on isomorphism of asymmetrical encryption algorithm

Abstract

The invention discloses a secret data transmission protection method based on the isomorphism of an asymmetrical encryption algorithm and aims to provide a protection method which has low cost, high efficiency and high safety and is used for the whole processes from decryption to transmission of secret data. A server trusted entity firstly selects a random number r, fakes a cipher text c of secret data, and sends the result to a client trusted entity through a public network; the client trusted entity decrypts the data and returns the result to the server trusted entity through the public network; and the server trusted entity restores a plain text m of the secret data from the result according to the isomorphism of the asymmetrical encryption algorithm. The invention solves the problem of safety when the secret data are transferred in non-trusted clients, open networks and server non-trusted user spaces, and does not need additional identity authentication, thereby reducing the cost.

Description

technical field [0001] The invention relates to a transmission protection method for secret data between entities in an open network system in the computer field. Background technique [0002] The development of information technology enables organizations such as governments and enterprises to place offices anywhere, allowing employees in different locations to work collaboratively through the network. A direct negative result brought by the open network environment while facilitating users to share data and reducing data management costs is that data security issues are becoming more and more serious. In an open network system, data is stored on remote servers that are not directly controlled by users, and attacks by malicious users on the network or servers may lead to leakage of user data. [0003] Data encryption is the only practical and effective method to ensure the security of secret data storage and transmission. According to different key types, data encryption ...

AI Technical Summary

Problems solved by technology

[0008] Although the SSL method can ensure the security of secret data transmission in an insecure network, it has the following disadvantages: (1) When using this method, the identity of the client and server needs to be authenticated first, and a series of interactive processes need to be passed after authentication To negotiate encryption keys, encryption algorithms and other session information, the overhead is relatively large; (2) This method only guarantees the security of data during network transmission, when the client or server trusted entity (referring to the After the part other than the operating system kernel, smart card device, etc. (such as user space related programs) is intruded, it cannot guarantee the security of the secret data after it leaves the trusted entity and before it is transmitted through the network through encryption

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