Abstract
In Cloud Computing, the data stored in the external servers may be tampered or deleted by unauthorized persons or selfish Cloud Service Providers (CSPs). Hence, the Cloud Data Owners (CDOs) have to provide assurance to the integrity and correctness of the stored data in the server. In this paper, a Verification of Data Integrity and Co-operative Loss Recovery technique for secure data storage in Cloud Computing is proposed. In this technique, a ciphertext file is split into various cipher blocks and distributed to randomly selected cloud service providers (CSPs) by the cloud data owner (CDO). If a cloud data user (CDU) wants to access any file, the corresponding ciphertext file is reconstructed from the blocks and downloaded by the user. The file can be decrypted if the attribute set of the user matches the access policy of the application. By simulation results, we show that the proposed technique enhances the data integrity and confidentiality.
Highlights
The recent development of cloud computing has shown its potential to reshape the current way that IT hardware is designed and purchased
Experimental results To validate the VDI-CLR technique presented in the previous section, we have implemented it in Java based on the CP-ABE toolkit and the Java Pairing-Based Cryptography library (JPBC) (De Caro & Iovino, 2011)
Results for varying file size The experimental results are obtained by varying the size of the files to be downloaded by the cloud data user (CDU)
Summary
The recent development of cloud computing has shown its potential to reshape the current way that IT hardware is designed and purchased. Since in both CCS-FRS and RSSNS, the data blocks are distributed to all CSPs, they need higher reconstruction time.
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