Cryptology ePrint Archive: Report 2022/040

Ensuring Accountability and Outsourced Decryption in IoT Systems using Ciphertext-Policy Attribute-Based Encryption


Abstract: Attribute based cryptography enhances the chances of secure communication on large scale. There are several features of attribute based encryption which have been proposed as different protocols. Most of these are suitable for access control in large systems like cloud services. Very few protocols focus on reducing the computational overhead for lower end devices like Internet of Things sensors and actuators. Hence, it is desirable to have a mix of features in protocols for IoT architecture. Our protocol enforces accountability of different parties involved while reducing the computational overhead during decryption on miniature devices. We prove that our protocol is RCCA-secure in selective security model and achieve accountability and unlinkability.

Category / Keywords: cryptographic protocols / ABE, CP-ABE, Accountability, Outsourced Decryption, Paillier based Cryptography, IoT Systems

Date: received 12 Jan 2022

Contact author: ambili_p180002cs at nitc ac in

Available format(s): PDF | BibTeX Citation

Version: 20220114:072840 (All versions of this report)

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