Paper 2022/039

Outsourced CP-ABE with Whitebox Accountability in IoT Systems

AMBILI K N and JIMMY JOSE

Abstract

Cryptography based on identity and attributes enhances the chance of secure communication on a large scale. Several attribute-based encryption schemes achieve different objectives when used in various protocols. Most of these are suitable for large systems like cloud services. There are a few protocols which focus on reducing the computational overhead for lower end devices like Internet of Things sensors and actuators. It is desirable to have a mix of features in protocols for IoT security architecture. We first propose a scheme to ensure accountability in CPABE scheme FAME. The protocol is proven CPA-secure with full security in random oracle model. We also prove its accountability. We also propose a hybrid protocol that enforces user accountability and outsourced decryption in IoT systems and achieve full security in replayable chosen ciphertext attack (RCCA) under random oracle model.

Metadata
Available format(s)
PDF
Category
Cryptographic protocols
Publication info
Preprint. MINOR revision.
Keywords
CPABEAccountabilityOutsourced decryptionIoT SystemsRCCA security
Contact author(s)
ambili_p180002cs @ nitc ac in
History
2022-01-14: received
Short URL
https://ia.cr/2022/039
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2022/039,
      author = {AMBILI K N and JIMMY JOSE},
      title = {Outsourced CP-ABE with Whitebox Accountability in IoT Systems},
      howpublished = {Cryptology ePrint Archive, Paper 2022/039},
      year = {2022},
      note = {\url{https://eprint.iacr.org/2022/039}},
      url = {https://eprint.iacr.org/2022/039}
}
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