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Multi-message multi-receiver signcryption scheme based on blockchain.

Xiao Dong Yang1, Wen Jia Wang1, Bin Shu2

  • 1College of Computer Science and Engineering, Northwest Normal University, Lanzhou 730070, China.

Mathematical Biosciences and Engineering : MBE
|December 5, 2023
PubMed
Summary
This summary is machine-generated.

This study replaces the Key Generation Center (KGC) with blockchain and smart contracts for enhanced multi-message signcryption. The new scheme improves privacy and security while reducing communication overhead.

Keywords:
blockchainconfidentialitydiscrete logarithmmulti-receiversigncryption

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Area of Science:

  • Computer Science
  • Cryptography
  • Information Security

Background:

  • Conventional multi-message multi-receiver signcryption systems face KGC attacks, privacy breaches, and high data volume.
  • Key Generation Center (KGC) reliance on secure channels for key transmission poses confidentiality risks.

Purpose of the Study:

  • To propose a novel certificateless signcryption scheme using blockchain and smart contracts.
  • To enhance user identity privacy and communication security in multi-message systems.

Main Methods:

  • Replaced the KGC with blockchain and smart contract technology.
  • Utilized public blockchain for parameter disclosure and smart contracts for key generation.
  • Incorporated conventional encryption for user identity privacy.

Main Results:

  • The scheme is resilient against KGC leakage, internal privilege, replay, DoS, and MITM attacks.
  • Achieved key escrow security and non-repudiation.
  • Demonstrated confidentiality and unforgeability under the random oracle model.

Conclusions:

  • The proposed blockchain-based signcryption scheme offers improved security and privacy over traditional methods.
  • It provides lower computational cost, shorter ciphertext length, and reduced communication/time overhead.