Research Article
Generic Mediated Encryption
@INPROCEEDINGS{10.1007/978-3-319-04283-1_10, author={Ibrahim Elashry and Yi Mu and Willy Susilo}, title={Generic Mediated Encryption}, proceedings={Security and Privacy in Communication Networks. 9th International ICST Conference, SecureComm 2013, Sydney, NSW, Australia, September 25-28, 2013, Revised Selected Papers}, proceedings_a={SECURECOMM}, year={2014}, month={6}, keywords={Key Revocation Problem Identity-based Encryption Double Encryption}, doi={10.1007/978-3-319-04283-1_10} }- Ibrahim Elashry
Yi Mu
Willy Susilo
Year: 2014
Generic Mediated Encryption
SECURECOMM
Springer
DOI: 10.1007/978-3-319-04283-1_10
Abstract
We propose a generic mediated encryption (GME) system that converts any identity based encryption (IBE) to a mediated IBE. This system is based on enveloping an IBE encrypted message using a user’s identity into another IBE envelope, using the identity of a security mediator (SEM) responsible for checking users for revocation. We present two security models based on the role of the adversary whether it is a revoked user or a hacked SEM. We prove that GME is as secure as the SEM’s IBE (the envelope) against a revoked user and as secure as the user’s IBE (the letter) against a hacked SEM. We also present two instantiations of GME. The first instantiation is based on the Boneh-Franklin (BF) FullIBE system, which is a pairing-based encryption system. The second instantiation is based on the Boneh, Gentry and Hamburg (BGH) system, which is a non pairing-based encryption system.