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AuthorMalluhi, Qutaibah M.
AuthorShikfa, Abdullatif
AuthorTrinh, Viet Cuong
Available date2020-10-15T10:38:43Z
Publication Date2017
Publication NameASIA CCS 2017 - Proceedings of the 2017 ACM Asia Conference on Computer and Communications Security
ResourceScopus
URIhttp://dx.doi.org/10.1145/3052973.3052987
URIhttp://hdl.handle.net/10576/16472
AbstractWe address the problem of ciphertext-policy attribute-based encryption with fine access control, a cryptographic primitive which has many concrete application scenarios such as Pay-TV, e-Health, Cloud Storage and so on. In this context we improve on previous LSSS based techniques by building on previous work of Hohenberger andWaters at PKC'13 and proposing a construction that achi- eves ciphertext size linear in the minimum between the size of the boolean access formula and the number of its clauses. Our construction also supports fast decryption. We also propose two interesting extensions: the first one aims at reducing storage and computation at the user side and is useful in the context of lightweight devices or devices using a cloud operator. The second proposes the use of multiple authorities to mitigate key escrow by the authority.
Languageen
PublisherAssociation for Computing Machinery, Inc
SubjectCiphertext-policy attribute-based encryption
DNF access policy
Fast decryption
LSSS access policy
Multi-authority
TitleA ciphertext-policy attribute-based encryption scheme with optimized ciphertext size and fast decryption
TypeConference Paper
Pagination230-240
dc.accessType Abstract Only


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