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Related Experiment Videos

BAAR: A framework for blockchain-based anonymous and revocable user authentication scheme.

Muhammad Ahmed1, Adnan Ahmad1, Furkh Zeshan1

  • 1Computer Science Department, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan.

Plos One
|March 31, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces BAAR, a novel blockchain authentication framework. BAAR enhances privacy and accountability with efficient, auditable revocation, reducing computational costs for blockchain systems.

Related Experiment Videos

Area of Science:

  • Cryptography and Information Security
  • Distributed Systems and Blockchain Technology

Background:

  • Existing blockchain authentication methods struggle to balance privacy, accountability, and efficient revocation.
  • Pairing-based cryptography in current anonymous schemes leads to high computational overhead, limiting scalability on platforms like Ethereum.

Purpose of the Study:

  • To present BAAR, a Blockchain-based Anonymous and Revocable authentication framework.
  • To enable anonymous and unlinkable authentication with selective attribute disclosure and auditable revocation.
  • To reduce on-chain computation and gas costs for blockchain authentication.

Main Methods:

  • Utilizes discrete logarithm setting over the secp256k1 elliptic curve.
  • Integrates Pedersen vector commitments, Schnorr-based zero-knowledge proofs, and a Merkle-tree-based dynamic accumulator.
  • Performs authentication and verification off-chain, maintaining only a compact revocation state on-chain.

Main Results:

  • Formal security analysis confirms unforgeability, unlinkability, attribute privacy, and revocation soundness.
  • Prototype implementation demonstrates low gas consumption and logarithmic-time revocation.
  • Achieves scalable performance with respect to the number of users and attributes.

Conclusions:

  • BAAR offers a practical solution for blockchain authentication, balancing strong privacy with deployability.
  • The framework is suitable for real-world blockchain-based identity and access-control systems.
  • Significantly reduces on-chain computational burden and gas fees.