A Novel Technique for Secure Data Retrieval

Abstract

Mobile nodes in a hostile network are likely to suffer
from intermittent network connectivity and frequent partitions.
Disruption-tolerant network (DTN) technologies are becoming
a productive solution that allow wireless devices to
communicate with each other and access the confidential
information or command reliably by exploiting external storage
nodes. The most critical issues in this scenario are the
enforcement of authorization policies and the policies update
for secure data retrieval in wireless networks. Ciphertextpolicy
attribute-based encryption (CP-ABE) is a promising
cryptographic solution to the access management problems.
However, the problem of applying CP-ABE in decentralized
DTNs introduces several security and privacy challenges with
regard to the attribute revocation, key escrow, and coordination
of attributes issued from different authorities. In this work, we
propose a secure data retrieval scheme using CP-AUBE for
decentralized DTNs where multiple key authorities manage
their multiple attributes independently. Also we enforce a group
oriented attribute based encryption and also incorporate an
efficient attribute and key renewal technology. The group
oriented encryption is done with concept of Bucketization
which produces an optimal solution. Hence the proposed
mechanism demonstrates how to securely and efficiently
manage the confidential data distributed in the disruptiontolerant
network