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Although ciphertext-policy attribute-based encryption (CP-ABE) is promising for realizing fine-grained attribute-based data sharing, attribute privacy protection issues remain to be solved. In this paper, we propose an anonymous CP-ABE scheme (ANON-CP-ABE) and prove its security under the Decisional Modified Bilinear Diffie-Hellman assumption. In the proposed scheme, the sensitive attribute values...
Data deduplication has been widely used in backups to save storage space and network bandwidth. In order to improve efficiency and security of the current deduplication schemes, this paper proposes a secure deduplication scheme. The proposed scheme supports cloud storage servers to eliminate deduplicate data before users' encryption operations, which can reduce computation overheads. Our scheme realizes...
As a promising cryptographic primitive, attributebased encryption (ABE) is adopted to protect outsourced data. However, there are some issues in existing attribute-based encryption schemes. First, the attribute authority manages attributes of users, so it may cause the leakage of users' privacy information. Second, because the access structures are directed along with the ciphertexts and may violate...
Public key encryption with keyword search applies only to the certain circumstances that keyword ciphertext can only be retrieved by a specific user and only supports single-keyword matching. In the existing searchable encryption schemes, either the communication mode is one-to-one, or only single-keyword search is supported. This paper proposes a searchable encryption that is based on attributes...
Decentralized multi-authority attribute-based encryption (ABE) has been adopted to protect outsourced data. However, there are some security issues. Firstly, the user's attributes information is leaked to the authorities and secondly, the access structure being sent along with ciphertext violates its privacy. To address these issues, an efficient decentralized attribute-based encryption scheme with...
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