Searching & Sharing Of Data over Cloud Using Key Aggregate Cryptosystem

cloud computing

Now a day, Data stored on cloud can be shared with the multiple users. In our project we are using cloud for data storage. We are focusing on securely, efficiently, and flexibly share data among multiple users and data searching over encrypted cloud data. Privacy of user’s data is a critical question of cloud storage. In our project client outsourced his/her encrypted data to a cloud server and authorize the latter to search on his/her behalf by using symmetric searchable encryption scheme. We are using public key cryptography for storing and sharing data. In our system we are creating a fixed size cipher texts that is impartial of data size. Therefore, it is possible to share data and to give authorized right for decryption of any set of cipher text. The data owner can share subset of files with other users by authorizing them an access rights and constant size of aggregate key. As per access rights search can be applied over restricted data set. This newly generated Aggregate Key can be send via email, mobile OTP or be stored in a smart card with very limited secure storage. Proposed approach aims to reduce security risk and is more flexible than existing schemes.

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