A ciphertext-policy attribute-based encryption scheme with optimized ciphertext size and fast decryption
المؤلف | Malluhi, Qutaibah M. |
المؤلف | Shikfa, Abdullatif |
المؤلف | Trinh, Viet Cuong |
تاريخ الإتاحة | 2020-10-15T10:38:43Z |
تاريخ النشر | 2017 |
اسم المنشور | ASIA CCS 2017 - Proceedings of the 2017 ACM Asia Conference on Computer and Communications Security |
المصدر | Scopus |
الملخص | We 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. |
اللغة | en |
الناشر | Association for Computing Machinery, Inc |
الموضوع | Ciphertext-policy attribute-based encryption DNF access policy Fast decryption LSSS access policy Multi-authority |
النوع | Conference |
الصفحات | 230-240 |
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