Abstract
Mobile nodes in
military environments such as a battlefield or a hostile region are likely to
suffer from intermittent network connectivity and frequent partitions.
Disruption-tolerant network (DTN) technologies are becoming successful
solutions that allow wireless devices carried by soldiers to communicate with
each other and access the confidential information or command reliably by
exploiting external storage nodes. Some of the most challenging issues in this
scenario are the enforcement of authorization policies and the policies update
for secure data retrieval. Ciphertext-policy attribute-based encryption
(CP-ABE) is a promising cryptographic solution to the access control issues. 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 paper, we propose a secure data retrieval scheme using CP-ABE for
decentralized DTNs where multiple key authorities manage their attributes
independently. We demonstrate how to apply the proposed mechanism to securely
and efficiently manage the confidential data distributed in the
disruption-tolerant military network.
Domain : Networking
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