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Keyword ciphertext generation method and device for cloud storage data

A keyword and cloud storage technology, which is applied in secure communication devices, digital transmission systems, and key distribution, can solve problems such as cloud server keyword guessing attacks, and achieve high security and practicability, strong security and practicability, The effect of ensuring safety

Active Publication Date: 2019-09-20
SOUTHWEST PETROLEUM UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the keyword space with low entropy value, there may be the problem of cloud server keyword guessing attack. Therefore, how to use a safe and practical encryption method to encrypt keywords to ensure user data security is the data One of the major current issues in the crypto space

Method used

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  • Keyword ciphertext generation method and device for cloud storage data

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Embodiment Construction

[0037] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

[0038] With the development of large-capacity, low-cost, and high-availability cloud storage services, many groups and individuals choose to store data in cloud storage and retrieve them when needed. Since the data stored on the cloud server is out of the actual control of the user, how to ensure the security of the data on the cloud has become a thorny issue. Encryption is the mainstream method to ensure data privacy. By safely selecting the key and encryption algorithm, the data is encrypted to obtain ciphertext, and storing the ciphertext in the cloud can prevent information from being illegally obtained. However, after the information is encrypted, the encrypted ciphertext becomes meaningless for the cloud server without the key, and the traditional data search method is no longer applicable. I...

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Abstract

The invention provides a keyword ciphertext generation method and device for cloud storage data, a cloud storage anti-quantum computing public key searchable encryption method, a cloud storage system, a storage medium and electronic equipment. The cloud storage data keyword ciphertext generation method comprises the steps of acquiring keyword information from data uploaded by a data owner; determining a random bit string; performing bit string encryption on the keyword information to determine a first component; performing bit string encryption on the random bit string to determine a second component; determining a third component according to the first component and an agent authorization public key and an agent authorization key between the agent and the data owner; and determining the keyword ciphertext based on the first component, the second component and the third component of the keyword ciphertext. By adopting the bit string encryption mode, the binary bit string encryption of the keyword information can be realized, the data security is improved, and the bit string encryption also has stronger practical application advantages and stronger practicability.

Description

technical field [0001] The present application relates to the field of data encryption, in particular, to a keyword ciphertext generation method and device for cloud storage data, a public key searchable encryption method for cloud storage anti-quantum computing, cloud storage system, storage medium and electronic equipment. Background technique [0002] With the development of large-capacity, low-cost, and high-availability cloud storage services, many groups and individuals choose to store data in cloud storage and retrieve them when needed. For the data stored on the cloud server that is out of the actual control of the user, encryption is usually used to ensure data privacy. By safely selecting the key and encryption algorithm, the data is encrypted to obtain ciphertext, and the ciphertext is stored in the cloud. It can prevent information from being illegally obtained. However, after the information is encrypted, the encrypted ciphertext becomes meaningless for the clo...

Claims

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Application Information

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IPC IPC(8): H04L9/08H04L9/32H04L29/08
CPCH04L9/0861H04L9/088H04L9/0825H04L9/3236H04L9/3247H04L67/1097
Inventor 张晓均唐尧李岚茜黄超单卫民杜斌谢诚叶伟黄琴刘婉怡李亚郝云溥
Owner SOUTHWEST PETROLEUM UNIV
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