Welcome to the resource topic for 2008/139
Title:
Chosen-Ciphertext Secure Fuzzy Identity-Based Key Encapsulation without ROM
Authors: Liming Fang, Jiandong Wang, Yongjun Ren, Jinyue Xia, Shizhu Bian
Abstract:We use hybrid encryption with Fuzzy Identity-Based Encryption (Fuzzy-IBE) schemes, and present the first and efficient fuzzy identity-based key encapsulation mechanism (Fuzzy-IB-KEM) schemes which are chosen-ciphertext secure (CCA) without random oracle in the selective-ID model. To achieve these goals, we consider Fuzzy-IBE schemes as consisting of separate key and data encapsulation mechanisms (KEM-DEM), and then give the definition of Fuzzy-IB-KEM. Our main idea is to enhance Sahai and Waters’ “large universe” construction (Sahai and Waters, 2005), chosen-plaintext secure (CPA) Fuzzy-IBE, by adding some redundant information to the ciphertext to make it CCA-secure.
ePrint: https://eprint.iacr.org/2008/139
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