Secure Data Retrieval for Decentralized Disruption-Tolerant Hi-privacy Networks

Secure Data Retrieval for Decentralized Disruption-Tolerant Hi-privacy Networks          ------------------------------------------------------------------------------------------------------------                                                                      
                 Mobile nodes in military environments such as a

battlefield or a hostile region are likely to suffer from intermittent

network connectivity and frequent part                                                                                                                                       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 Hi-Privacy network.