Attribute-based encryption has been widely second-hand in cloud computing where a data provider outsources his/her encrypted data to a blur service provider, and can split the data with users possessing specific qualifications. However, the standard ABE scheme does not support protected deduplication, which is crucial for eliminating duplicate copies of the same data in arrange to save cargo space space and system bandwidth. Here, present an attribute-based storage system with protected deduplication in a hybrid cloud setting, where a confidential cloud is in charge for duplicate uncovering and a public blur manages the storage. Compared with the prior data deduplication systems, our scheme has two advantages. Firstly, it can be second-hand to in secret share data by means of users by specifying admission policies rather than distribution decryption keys. Secondly, it achieves the standard view of semantic refuge for data discretion while existing systems only attain it by defining a weaker refuge notion. In addition, put forth a method to modify a ciphertext over one admission policy into ciphertexts of the same plaintext but beneath other right of entry policies without enlightening the underlying plaintext.

Cloud Computing, ABE, Architecture

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