Data storage method for privacy protection based on encryption password and data fractionation

Abstract

The invention relates to a data storage method for privacy protection based on an encryption password and data fractionation. A user specifies data to be operated on a client and inputs the encryption password, the client converts the encryption password into a key for encrypting a plaintext and converts the plaintext into a ciphertext by use of an encryption algorithm, then the client divides the ciphertext into n parts by use of a (n, t) data fractionation algorithm and respectively stores the n parts of the ciphertext on a plurality of servers; when the user needs to recover the data, the clients takes back t parts of the n parts of ciphertext sub-blocks and recovers the ciphertext by use of a recovering algorithm corresponding to the data fractionation algorithm; and the client converts the encryption password input by the user into a key and coverts the ciphertext into a plaintext by use of a corresponding decryption algorithm. The data storage method provided by the invention can be used for effectively protecting the data privacy of the user without adding additional equipment, thereby facilitating system deployment and user application.

Description

technical field [0001] The invention relates to the field of data security, in particular to a privacy-protected data storage method based on encrypted passwords and data splitting. Background technique [0002] In the era of cloud computing, people have more and more data. In order to facilitate data acquisition, mobile office, etc., people often store data on servers. If the data is not encrypted and stored, it will lead to the leakage of user privacy. And if the data is encrypted and stored, the generation and storage of the key is not a simple matter. The key can be generated by extracting biometric features such as user fingerprints through special equipment, or it can be randomly generated and then stored with tokens and other devices. Although this solves the problem of key generation and storage, it also introduces additional special equipment, so it is not convenient for system deployment and user use. Then people thought that the password that the user could re...

AI Technical Summary

Problems solved by technology

Although this avoids the trouble of generating and storing keys, such keys are easy to be exhausted; the administrator of the data storage server or a hacker who has invaded the server can conduct offline dictionary attacks on the ciphertext to guess the key and recover the plaintext , resulting in leakage of user privacy

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