In , an ad-hoc network is perceived as a community of interconnected autonomous devices providing services and resources to each other. Such devices often belong to users from different security domains that do not have pre-existing trust relationships. A security framework is therefore needed to ensure trustworthy interactions within such kind of communities. A comprehensive policy-based security framework supporting the establishment, evolution and management of ad-hoc networks is proposed in . In this paper, we first revisit the concept of policy-based encryption and describe a policybased encryption scheme from bilinear pairings. Our scheme improves the one proposed in  in terms of ciphertext size, while at the same time preserving the computational efficiency. Then, we leverage the framework proposed in  and show how a privacyenhanced secure establishment of ad-hoc communities can be achieved using the policybased encryption primitive.
Establishment of ad-hoc communities through policy-based cryptography
WCAN 2006, 2nd Workshop on Cryptography for Ad hoc Networks, July 16th, 2006, Venice, Italy | Also published in Electronic Notes in Theoretical Computer Science, Volume 171, N°1
© Elsevier. Personal use of this material is permitted. The definitive version of this paper was published in WCAN 2006, 2nd Workshop on Cryptography for Ad hoc Networks, July 16th, 2006, Venice, Italy | Also published in Electronic Notes in Theoretical Computer Science, Volume 171, N°1 and is available at : http://dx.doi.org/10.1016/j.entcs.2006.11.013
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