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dc.contributor.author | Daza, Vanesa |
dc.contributor.author | Herranz, Javier |
dc.contributor.author | Morillo, Paz |
dc.contributor.author | Ràfols, Carla |
dc.date.accessioned | 2019-09-13T12:49:12Z |
dc.date.available | 2019-09-13T12:49:12Z |
dc.date.issued | 2007 |
dc.identifier.citation | Daza V, Herranz J, Morillo P, Ràfols C. CCA2-secure threshold broadcast encryption with shorter ciphertexts. In: Susilo W, Liu JK, Mu Y, editors. ProvSec 2007: Provable Security First International Conference. Proceedings; 2007 Nov 1-2; Wollongong, Australia. Berlin: Springer; 2007. p. 35-50. (LNCS; no. 4784). DOI: 10.1007/978-3-540-75670-5_3 |
dc.identifier.uri | http://hdl.handle.net/10230/42275 |
dc.description | Comunicació presentada a: ProvSec 2007: Provable Security First International Conference, celebrada de l'1 al 2 de novembre de 2007 a Wollongong, Austràlia. |
dc.description.abstract | In a threshold broadcast encryption scheme, a sender chooses (ad-hoc) a set of n receivers and a threshold t, and then encrypts a message by using the public keys of all the receivers, in such a way that the original plaintext can be recovered only if at least t receivers cooperate. Previously proposed threshold broadcast encryption schemes have ciphertexts whose length is O(n). In this paper, we propose new schemes, for both PKI and identity-based scenarios, where the ciphertexts’ length is O(n − t). The construction uses secret sharing techniques and the Canetti-Halevi-Katz transformation to achieve chosen-ciphertext security. The security of our schemes is formally proved under the Decisional Bilinear Diffie-Hellman (DBDH) Assumption. |
dc.format.mimetype | application/pdf |
dc.language.iso | eng |
dc.publisher | Springer |
dc.relation.ispartof | Susilo W, Liu JK, Mu Y, editors. ProvSec 2007: Provable Security First International Conference. Proceedings; 2007 Nov 1-2; Wollongong, Australia. Berlin: Springer; 2007. p. 35-50. (LNCS; no. 4784). |
dc.rights | © Springer The final publication is available at Springer via https://doi.org/10.1007/978-3-540-75670-5_3 |
dc.title | CCA2-secure threshold broadcast encryption with shorter ciphertexts |
dc.type | info:eu-repo/semantics/conferenceObject |
dc.identifier.doi | http://dx.doi.org/10.1007/978-3-540-75670-5_3 |
dc.rights.accessRights | info:eu-repo/semantics/openAccess |
dc.type.version | info:eu-repo/semantics/acceptedVersion |