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)
- 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
-
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} }