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<p>In this paper, a distributed authorization and encryption framework for secure image sharing in cloud environments is presented. The technique uses Lagrange interpolation to enable multiparty key reconstruction using Ciphertext-Policy Attribute-Based Encryption (CP-ABE). Asymmetric encryption is used to encrypt and distribute the symmetric secret key, which is subsequently separated using Shamir’s Secret Sharing. Lightweight Functional-Based Encryption (LW-FBE) is used together with XOR procedures to ensure data confidentiality and computational efficiency. In order to decrypt data, the technique introduces a threshold mechanism (k ≥ 3) that requires cooperation between data owners and consumers. Differential attack analysis, statistical correlation and encryption time are used to measure performance. The framework is appropriate for high-security applications in industries like healthcare and finance due to its components are resistant to chosen-plaintext and collusion attacks.</p>

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Distributed authorization scheme using lagrange interpolation and attribute-based encryption for secure image encryption

  • 期刊论文

  • 发表日期：

    2025年12月20日

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  • Partha Paul,
  • Binod Kumar Sharma,
  • Keshav Sinha

摘要

In this paper, a distributed authorization and encryption framework for secure image sharing in cloud environments is presented. The technique uses Lagrange interpolation to enable multiparty key reconstruction using Ciphertext-Policy Attribute-Based Encryption (CP-ABE). Asymmetric encryption is used to encrypt and distribute the symmetric secret key, which is subsequently separated using Shamir’s Secret Sharing. Lightweight Functional-Based Encryption (LW-FBE) is used together with XOR procedures to ensure data confidentiality and computational efficiency. In order to decrypt data, the technique introduces a threshold mechanism (k ≥ 3) that requires cooperation between data owners and consumers. Differential attack analysis, statistical correlation and encryption time are used to measure performance. The framework is appropriate for high-security applications in industries like healthcare and finance due to its components are resistant to chosen-plaintext and collusion attacks.