Implementation of Secure File Storage on Cloud with Owner-Defined Attributes for Encryption
Supriya Kute, S. B. Javheri · 2018
Cloud computing allows us to create, configure, and personalize the operations online. In the cloud computing environment, the owner could use encryption with attributes to encrypt the uploaded data which accomplishing access control and data security. Similarly data can be decrypted if authorized person want to access it. In the previous work, user can encrypt and decrypt the file according to the set of attributes. But there are some problems and questions related to that work. For example, during the delegation, the cloud servers could replace data or represent wrong data and respond a fake result with malicious intent. In addition, the cloud server may cheat the authorized user by saying that they are not authorized one for accessing data. Also, the access structure is not flexible during cryptography, Since access structure is applicable to the circuits for greater data security. System develop an attribute-based design with a time specified attribute scheme encryption. In this system, whenever the owner uploads a file, it is labelled with a set of attributes that includes: department, work profile, branch, experience which is called as access structure. After this time interval, date and location also added. The user can decrypt and download the file if the time interval, date location and attributes matches with the owner set attributes. Before this, authority will check whether user is authorized to access any of the file. To achieve more security file is split into multiple fragments according to file size and stored on multiple nodes instead of being stored on a single node. The system has created a confirmable calculation, an authorized user access and detailed approach. It also gives us the guarantee of the correctness of the delegated computer results.