DOTNET PROJECT
Verifiable
and Multi-Keyword Searchable Attribute-Based Encryption Scheme for Cloud
Storage
Abstract:
In attribute-based
searchable encryption (ABSE) scheme, data owners can encrypt their data with
access policy for security consideration, and encrypt keywords to obtain
keyword index for privacy keyword search, and data users can search interesting
keyword on keyword indexes by keyword search trapdoor. However, many existing
searchable encryption schemes only support single keyword search and most of
the existing attribute-based encryption (ABE) schemes have high computational
costs at user client. These problems significantly limit the application of
attribute-based searchable encryption schemes in practice. In this paper, we
propose a verifiable and multi-keyword searchable attribute-based encryption
(VMKS-ABE) scheme for cloud storage, in our new scheme, multi-keyword can be
searched and the search privacy is protected. That is, the cloud server can
search the multi-keyword with keyword search trapdoor but it does not know any
information about the keywords searched. In the proposed scheme, many computing
tasks are outsourced to the cloud proxy server, which greatly reduces the
computing burden at the user client. Besides, the scheme also supports the
verification of the correctness of the outsourced private key. The proposed
scheme is proved secure that the keyword index is indistinguishable under the
adaptive keyword attacks in the general group model, and the ciphertext is
selective secure under selective plaintext attacks in the random oracle model.
The security and experimental results show that our scheme is suitable for
practicability.
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