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Asim, M. and Ibraimi, L. and Petkovic, M.
(2011)
Ciphertext-Policy Attribute-Based Broadcast Encryption Scheme.
In: Proceedings of the 12th IFIP TC 6 / TC 11 International Conference on Communications and Multimedia Security (CMS 2011), 19-21 Oct 2011, Ghent, Belgium.
pp. 244-246.
Lecture Notes in Computer Science 7025.
Springer Verlag.
ISSN 0302-9743
ISBN 978-3-642-24711-8
Full text available as:
Official URL: http://dx.doi.org/10.1007/978-3-642-24712-5_25  AbstractIn this work, we design a new attribute-based encryption scheme with the revocation capability. In the proposed schemes, the user (broadcaster) encrypts the data according to an access policy over the set of attributes, and a list of the identities of revoked users. Only recipients who have attributes which satisfy the access policy and whose identity is not in the list of revoked users will be able to decrypt the message.The proposed scheme can be used for revocation of up to t users. The complexity of proposed schemes is dependent on the number of revoked users r, rather than on the total number n of users in the system. The security of the scheme has been proved under the Decisional Bilinear Diffie-Hellman (DBDH) assumption.
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