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A Ring Learning with Errors-Based Ciphertext-Policy Attribute-Based Proxy Re-Encryption Scheme for Secure Big Data

Juyan Li1,2,3, Jialiang Peng1,3, Zhiqi Qiao1,3

  • 1School of Data Science and Technology, Heilongjiang University, Harbin, China.

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|April 13, 2022
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Summary
This summary is machine-generated.

This study introduces a new ciphertext-policy attribute-based proxy re-encryption (CP-ABPRE) scheme for secure big data sharing in the cloud. The novel scheme enhances data security and enables efficient sharing across different user attribute sets.

Keywords:
RLWEaccess controlattribute-based encryptionbig data sharingproxy re-encryption

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Area of Science:

  • Cryptography and Information Security
  • Cloud Computing Security
  • Big Data Management

Background:

  • Cloud storage of big data presents security challenges due to user data being outside direct control.
  • Ciphertext-Policy Attribute-Based Encryption (CP-ABE) offers access control but limited sharing flexibility.
  • Attribute-Based Proxy Re-Encryption (ABPRE) facilitates sharing but requires integration with encryption schemes.

Purpose of the Study:

  • To develop a secure and efficient Ciphertext-Policy Attribute-Based Proxy Re-Encryption (CP-ABPRE) scheme for big data sharing in cloud environments.
  • To enhance data access control and enable seamless sharing among users with diverse attribute sets.
  • To improve upon existing ABPRE schemes by incorporating advanced cryptographic techniques.

Main Methods:

  • Modification of an existing Ring Learning With Errors (RLWE)-based attribute-based encryption scheme.
  • Introduction of re-encryption key generation, re-encryption ciphertext generation, and re-encryption ciphertext decryption algorithms.
  • Integration of a random vector hidden by threshold technology within the re-encryption key construction.

Main Results:

  • Construction of a novel CP-ABPRE scheme supporting threshold access structures based on RLWE.
  • The proposed scheme features smaller public parameters compared to existing solutions.
  • Demonstrated resistance against selective access structure and chosen plaintext attacks, with the capability to encrypt multiple plaintext bits simultaneously.

Conclusions:

  • The developed RLWE-based CP-ABPRE scheme provides a more suitable solution for big data sharing in the cloud.
  • Enhanced security features and efficiency make it advantageous for managing sensitive data access and sharing.
  • The scheme effectively balances access control with flexible data sharing across heterogeneous user groups.