A Combinatorial Construct for Keyless Message Dispersal (Work in Progress)

Camtepe, Seyit, Dawson, Edward, & Boyen, Xavier (2016) A Combinatorial Construct for Keyless Message Dispersal (Work in Progress).

Abstract

We propose a keyless and lightweight message transformation scheme based on the combinatorial design theory for the confidentiality of a message transmitted in multiple parts through a network with multiple independent paths, or for data stored in multiple parts by a set of independent storage services such as the cloud providers. Our combinatorial scheme disperses a message into v output parts so that (k-1) or less parts do not reveal any information about any message part, and the message can only be recovered by the party who possesses all v output parts. Combinatorial scheme generates an xor transformation structure to disperse the message into v output parts. Inversion is done by applying the same xor transformation structure on output parts. The structure is generated using generalized quadrangles from design theory which represents symmetric point and line incidence relations in a projective plane. We randomize our solution by adding a random salt value and dispersing it together with the message. We show that a passive adversary with capability of accessing (k-1) communication links or storage services has no advantage so that the scheme is indistinguishable under adaptive chosen ciphertext attack (IND-CCA2).

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ID Code: 94441
Item Type: Report
Refereed: No
Keywords: data dispersal, combinatorial dispersal, keyless message transformation, combinatorial design
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2016 The Author(s)
Deposited On: 05 Apr 2016 06:05
Last Modified: 09 Apr 2016 13:15

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