PROJECT TITLE:

Identity-Based Encryption with Outsourced Revocation in Cloud Computing - 2015

ABSTRACT:

Identity-Based Encryption (IBE) that simplifies the public key and certificate management at Public Key Infrastructure (PKI) is a crucial different to public key encryption. But, one among the main efficiency drawbacks of IBE is the overhead computation at Non-public Key Generator (PKG) throughout user revocation. Economical revocation has been well studied in traditional PKI setting, however the cumbersome management of certificates is exactly the burden that IBE strives to alleviate. In this paper, aiming at tackling the essential issue of identity revocation, we introduce outsourcing computation into IBE for the primary time and propose a revocable IBE theme within the server-aided setting. Our theme offloads most of the key generation connected operations during key-issuing and key-update processes to a Key Update Cloud Service Supplier, leaving only a constant range of simple operations for PKG and users to perform domestically. This goal is achieved by utilizing a completely unique collusion-resistant technique: we use a hybrid private key for every user, in which an AND gate is concerned to connect and certain the identity element and the time part. Furthermore, we have a tendency to propose another construction that is provable secure under the recently formulized Refereed Delegation of Computation model. Finally, we have a tendency to provide in depth experimental results to demonstrate the potency of our proposed construction.