DABKE: Secure deniable attribute-based key exchange framework

• Main Authors: TIAN, Yangguang, LI, Yingjiu, YANG, Guomin, SUSILO, Willy, MU, Yi, CUI, Hui, ZHANG, Yinghui
• Format: text
• Language: English
• Published: Institutional Knowledge at Singapore Management University 2019
• Subjects: Attribute-based Key Exchange; Impersonation Attacks; Strong Deniability; Generic Compiler; Information Security
• Online Access: https://ink.library.smu.edu.sg/sis_research/4350; https://ink.library.smu.edu.sg/context/sis_research/article/5353/viewcontent/DABKE_afv.pdf
• Institution: Singapore Management University

We introduce the first deniable attribute-based key exchange (DABKE) framework that is resilient to impersonation attacks. We define the formal security models for DABKE framework, and propose a generic compiler that converts any attribute-based key exchanges into deniable ones. We prove that it can achieve session key security and user privacy in the standard model, and strong deniability in the simulation-based paradigm. In particular, the proposed generic compiler ensures: 1) a dishonest user cannot impersonate other user's session participation in conversations since implicit authentication is used among authorized users; 2) an authorized user can plausibly deny his/her participation after secure conversations with others; 3) the strongest form of deniability is achieved using one-round communication between two authorized users.