Generic conversions from CPA to CCA without ciphertext expansion for threshold ABE with constant-size ciphertexts

• Main Authors: LAI, J, GUO, F, SUSILO, W, JIANG, P, YANG, Guomin, HUANG, X.
• Format: text
• Language: English
• Published: Institutional Knowledge at Singapore Management University 2022
• Subjects: Theory and Algorithms
• Online Access: https://ink.library.smu.edu.sg/sis_research/7727
• Institution: Singapore Management University

CCA security is desirable when designing encryption schemes because it captures active attackers. One efficient approach for achieving CCA security is to use generic conversions. We first design a CPA secure scheme, and then transform it into a CCA secure scheme using the Fujisaki-Okamoto technique...