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Revocable and Fog-Enabled Proxy Re-Encryption Scheme for IoT Environments.

Han-Yu Lin1, Pei-Ru Chen1

  • 1Department of Computer Science and Engineering, National Taiwan Ocean University, Keelung 202, Taiwan.

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|October 16, 2024
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Summary
This summary is machine-generated.

This research introduces a novel fog-based proxy re-encryption system for secure data sharing in the Internet of Things (IoT). It enhances security by using a time-updated key mechanism, eliminating the need for traditional user revocation lists.

Keywords:
IoTfog computingproxyre-encryptionrevocation

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Area of Science:

  • Computer Science
  • Cybersecurity
  • Cloud Computing

Background:

  • Internet of Things (IoT) devices are increasingly used, raising security concerns for data transmission in fog computing environments.
  • Existing proxy re-encryption methods for secure data sharing face challenges with user revocation and storage space.
  • Transmitting data across multiple devices in fog environments increases risks of interception and tampering.

Purpose of the Study:

  • To propose a fog-based proxy re-encryption system with revocable identity for secure cloud data sharing.
  • To address the limitations of traditional user revocation lists in managing decryption privileges.
  • To enhance data security and reduce storage overhead in IoT environments.

Main Methods:

  • Introduced a time-updated key mechanism for managing user decryption privileges.
  • Developed a fog-based proxy re-encryption scheme that avoids traditional user revocation lists.
  • Formally proved the scheme's security against adaptively chosen identity and chosen plaintext attacks (IND-PrID-CPA) under the Decisional Bilinear Diffie-Hellman (DBDH) assumption.

Main Results:

  • The proposed scheme enables secure cloud ciphertext sharing without decryption.
  • Revoked users cannot access renewed time-updated keys, preventing unauthorized data access.
  • The system demonstrates indistinguishability against chosen identity and plaintext attacks (IND-PrID-CPA).

Conclusions:

  • The novel time-updated key mechanism effectively revokes user privileges without a central revocation list.
  • The proposed fog-based proxy re-encryption system offers enhanced security and lower computational complexity compared to existing solutions.
  • This approach provides a more efficient and secure method for data sharing in IoT and fog computing environments.