A novel traceability approach in IoT paradigm for CP-ABE proxy re-encryption

Internet of Things (IoT) is a technology aimed to provide the cost effective infrastructure for today’s problems. Due to its plus points, it is widely deployed for various applications. Data generated from these applications need to be protected from prying eyes of the attacker. As identified in the research, CP-ABE (Ciphertext Policy Attribute Based Encryption) is a promising technique to provide the security of data with efficient multi casting. The naïve CP-ABE scheme suffers with issues like traceability, proxy re-encryption, constant length ciphertext, etc. Recently, In 2022, Jhang et al proposed the improved approach to improvise the basic CP-ABE scheme having traceability issues. However, it is yet to suffer from other issues like multi authority, proxy re-encryption and variable length ciphertext. One can use different schemes to achieve each of features which result in high computation overhead. Thus, we have improved the existing approach and proposed novel scheme which not only solve traceability but also provide proxy re-encryption as well as multi-authority and constant length ciphertext.