User Collusion Avoidance Scheme for Privacy-Preserving Decentralized Key-Policy Attribute-Based Encryption

Abstract

This is the accepted version of the paper.This version of the publication may differ from the final published version. Abstract-Decentralized attribute-based encryption (ABE) is a variant of multi-authority based ABE whereby any attribute authority (AA) can independently join and leave the system without collaborating with the existing AAs. In this paper, we propose a user collusion avoidance scheme which preserves the user's privacy when they interact with multiple authorities to obtain decryption credentials. The proposed scheme mitigates the well-known user collusion security vulnerability found in previous schemes. We show that our scheme relies on the standard complexity assumption (decisional bilienar Deffie-Hellman assumption). This is contrast to previous schemes which relies on non-standard assumption (q-decisional Diffie-Hellman inversion). PermanentIndex Terms-Attribute-based encryption, user collusion.

Challenges and techniques in Big data security and privacy: A review

“…On the basis of the work of Han et al, Rahulamathavan proposes a decentralized KP‐ABE scheme. By anonymous key issuing protocol, attribute authority choose which attributes are issued to users.…”

An Efficient Tate Pairing Algorithm for a Decentralized Key-Policy Attribute Based Encryption Scheme in Cloud Environments

“…Rahulamathavan et al [12] constructed the privacy-preserving decentralized KP-ABE scheme in a cloud environment. It protects the users' privacy when they communicate with multiple authorities to obtain decryption credentials.…”

“…This makes an algorithm inefficient due to its high computational complexity of bilinear pairing. In this paper, first, an efficient Tate pairing based on multi-base number representation system using point halving (TP-MBNR-PH) with point halving, tripling, and quintupling is proposed and then applied in decentralized KP-ABE [12] to determine its computational costs of encryption and decryption.…”

“…The TP-MBNR-PH algorithm is applied in decentralized KP-ABE to show the reduction in computational costs for encryption and decryption when compared with existing schemes [12,13].…”

Smart, secure and seamless access control scheme for mobile devices

“…In order to overcome this issue, we propose a new scheme in this paper which incorporates smart devices' dynamic attributes with the static attributes of privacypreserving decentralised ABE scheme. To achieve this, we modify the scheme in [11] in order to appropriately incorporate the dynamic attributes and to avoid user collusion [12]. Later in this paper, we perform extensive numerical analysis and security analysis to show that the proposed scheme is quicker and secure.…”