Survey on Secure Attribute-Based knowledge sharing theme Revisited on Cloud

Abstract

Attribute-based secret writing (ABE) has been wide utilized in cloud computing wherever an information
supplier outsources his/her encrypted data to a cloud service supplie, and can share the info with users possessing
specific credentials (or attributes). However, the standard ABE system doesn't support secure deduplication, which is
crucial for eliminating duplicate copies of identical information so as to save lots of storage space and network
information measure. during this paper, we tend to gift Associate in Nursing attribute-based storage system with secure
deduplication in an exceedingly hybrid cloud setting, wherever a non-public cloud is to blame for duplicate detection and
a public cloud manages the storage. Compared with the previous information deduplication systems, our system has 2
advantages. Firstly, it are often accustomed confidentially share information with users by specifying access policies
instead of sharing decoding keys. Secondly, it achieves the standard notion of linguistics security for information
confidentiality whereas existing systems solely reach it by shaping a weaker security notion. additionally, we put forth a
technique to change a ciphertext over one access policy into cipher texts of an equivalent plaintext however below
alternative access policies while not revealing the underlying plaintext.