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<ul><li><p>IJSRD - International Journal for Scientific Research &amp; Development| Vol. 5, Issue 01, 2017 | ISSN (online): 2321-0613 </p><p>All rights reserved by www.ijsrd.com 373 </p><p>Providing Data Security in Cloud Computing Using Secure Visual </p><p>Cryptography </p><p>A.Naveen Kumar1 T.Harivaishnavi2 S.Santhiya3 S.Kalaiselvi4 1Assistant Professor 2,3,4BE Student </p><p>1,2,3,4Department of Computer Science &amp; Engineering 1,2,3,4The Kavery Engineering College</p><p>Abstract Cloud computing is the model for enabling the </p><p>ubiquitous convenient, on demand network access to a </p><p>shared pool off configurable computing resources (e.g.: </p><p>networks, server, storage application and services) that can </p><p>be provide rapidly provisioned and released with minimal </p><p>management effort or service provider interaction. Security </p><p>in the biggest challenges in the cloud computing. Because </p><p>the data are should in the service provider server. To provide </p><p>the security for the data, have to encrypt the data. In this </p><p>paper, encrypted the data using visual cryptography </p><p>techniques. To generate the key for encryption by RSA </p><p>algorithm. It provides secure way to encrypt the data. </p><p>Key words: Cloud Computing, Cryptography </p><p>I. INTRODUCTION </p><p>In cloud storage against corruptions to protect outsourced </p><p>data in adding fault tolerance to cloud storage together with </p><p>data integrity checking and failure reparation becomes </p><p>critical. While providing fault tolerance. Recently </p><p>regenerating codes have gained popularity due to their lower </p><p>repair bandwidth. We propose a third party auditing scheme </p><p>for checking de- duplication and regenerating-code-based </p><p>cloud storage. To solve the regeneration problem of failed </p><p>authenticators in the absence of data owners, we introduce a </p><p>web service, which is free to regenerate the authenticators, </p><p>into the traditional third party auditing system model. </p><p>Moreover, to regenerate using partial keys we design a </p><p>novel third party verifiable authenticator, to generate by a </p><p>couple of keys and to regenerated using partial keys. Thus, </p><p>our Scheme can completely release data owners from online </p><p>burden. Cloud computing, to put it simply, means Internet </p><p>Computing. Hence the term cloud computing for </p><p>computation done through the Internet it also commonly </p><p>visualized as cloud. With Cloud Computing users can access </p><p>database resources via the Internet from anywhere, for when </p><p>they need, without worrying about any maintenance or </p><p>management of actual resources. Besides, databases in cloud </p><p>are very dynamic and scalable. Cloud computing is a model </p><p>to share pool of configurable computing resources for </p><p>enabling convenient, on-demand network access. </p><p>II. EXISTING SYSTEM </p><p> In this paper we are application which increase the security provided by visual cryptography and provides </p><p>third party authority. </p><p> Third party authority scheme for checking and regenerating code based cloud storage. </p><p> In this system a user upload files to the cloud using cloud services, the TPA provides security to both the </p><p>cloud as well as the data being uploaded. </p><p>A. Disadvantages for Existing System </p><p> Information are not fully secure in cloud storage. </p><p> The system that will eliminate issues like de-duplication. </p><p> Data authentication and security using visual cryptography. </p><p>III. PROPOSED SYSTEM </p><p> In our proposed system, introduce the security system based on visual cryptography. </p><p> It also the encryption keys are generated by TPA using RSA algorithm. </p><p> The visual cryptography is providing the secure data to cloud storage. </p><p> But visual cryptography using the RSA algorithm is double security provide by the public key using encrypt </p><p>from the user information of secure data. </p><p>A. Advantages of Proposed System: </p><p> The data are security provided by the cloud data storage. </p><p> The visual cryptography using from cryptographic techniques. </p><p> RSA algorithm provided by double security in the user data. </p><p>IV. IMPLEMENTATION </p><p>A. Module Description: </p><p> Cloud setup. </p><p> User interface design. </p><p> Key management or key generation. </p><p> Encryption using visual cryptography. </p><p>B. Cloud Setup: </p><p> Cloud setup module is using the cloud sim tool. </p><p> Cloud sim is a framework for modelling and simulation of cloud computing infrastructure </p><p>service. </p><p> Cloud sim support for modelling and simulation of large scale cloud computing data centres. </p><p>V. USER INTERFACE DESIGN </p></li><li><p>Providing Data Security in Cloud Computing Using Secure Visual Cryptography </p><p> (IJSRD/Vol. 5/Issue 01/2017/098) </p><p> All rights reserved by www.ijsrd.com 374 </p><p> Fig. 1: </p><p>The login form are created by html coding with java script. </p><p>A. Key Management or Key Generation: </p><p>1) Importance of Key Management: </p><p> Key management is the management of cryptographic keys in a cryptosystem. This includes dealing with the </p><p>generation, exchange, storage, use, and replacement of </p><p>keys. </p><p> Key management concerns the keys at user level, either between the users or systems. This is contrast to key </p><p>scheduling. </p><p> Successful key management is critical to a security of the cryptosystem. </p><p> In practice it is arguably the most difficult aspect of a cryptography because it involves the system policy, </p><p>user training, organizational and departmental </p><p>interactions, and coordination between all of these </p><p>elements. </p><p>VI. RSA ALGORITHM </p><p>RSA algorithm is one of the first practical public key </p><p>encryption cryptosystems and is widely used for secure data </p><p>transmission. In such a cryptosystem, the encryption key is </p><p>public and differs from the decryption key which is secret. </p><p>In RSA, this asymmetry is based on the practical difficulty </p><p>of factoring the product of two large prime numbers, the </p><p>factoring problem. RSA is made of the initial letters of the </p><p>names of Ron Rivest, Adi Shamir, and Leonard Adleman, </p><p>who first publicly described the algorithm in 1977. Clifford </p><p>Cocks, an English mathematician has developed an </p><p>equivalent system in 1973, but it was not declassified until </p><p>in 1997. A user of RSA creates and then publishes a public </p><p>key based on two large prime numbers, along with an </p><p>auxiliary value. The prime numbers must be secret in </p><p>anyone can use the public key to encrypt a message, but </p><p>with currently published methods, if the public key is large </p><p>enough, only someone with knowledge of the prime </p><p>numbers can feasibly to decode with the message in </p><p>breaking RSA encryption is known as the RSA problem </p><p>whether it is as hard as the factoring problem remains an </p><p>open question data is split into number of parts and each part </p><p>will be stored at different servers. The data will be stored in </p><p>database initially, as the user upload a file. A hash key is </p><p>generated at the user and also at database. The database </p><p>check whether is already exist a copy of user data, if it is </p><p>exist then only hash key will be generated but the data will </p><p>not be uploaded to avoid the de-duplication(data </p><p>duplication). Then the TPA checks the data authentication </p><p>also provide security to data. As the data is uploaded on the </p><p>server load balancing take place at each server. </p><p>VII. ENCRYPTION USING VISUAL CRYPTOGRAPHY </p><p>Visual Cryptography is a cryptographic technique is visual </p><p>Information (Image, text, etc) gets encrypted in such a way </p><p>that the decryption can be performed by the human visual </p><p>system without aid of the computers. It is also used to </p><p>protect image based secret in information. The technique </p><p>random sequence is used to divide the sequence of divide an </p><p>image into a n number of shares. The shares are sent through </p><p>different communication channels from sender to receiver so </p><p>that probability of getting sufficient shares by the intruder </p><p>minimizes. </p><p>A. Advantage of Visual Cryptography: </p><p> Encryption doesnt require any NP hard problem dependency. </p><p> Decryption algorithm is not required. So the unknown person unknown to cryptography can decrypt the </p><p>message. </p><p> We can send the cipher text through FAX or E-MAIL. </p><p> Infinite Computation in Power cant predict the message. </p></li><li><p>Providing Data Security in Cloud Computing Using Secure Visual Cryptography </p><p> (IJSRD/Vol. 5/Issue 01/2017/098) </p><p> All rights reserved by www.ijsrd.com 375 </p><p>VIII. CONCLUSION </p><p>In this project data are should be secure in cloud. to provide </p><p>the security for the data is have to encrypted the data using </p><p>visual cryptography techniques. To generate the key for </p><p>encryption by RSA algorithm. It provides secure way to </p><p>encrypt the data. </p><p>REFERENCES </p><p>[1] Q. Zheng and S. Xu, Secure and Efficient Proof of Storage with De duplication, in Proc. ACM Conference </p><p>on Data and Application Security and Privacy </p><p>(CODASPY),2016 </p><p>[2] B. Chen, R. Curtmola, G. Ateniese, and R. Burns, Remote Data Checking for Network Coding-based </p><p>Distributed storage Systems, in Proc. ACM Cloud </p><p>Computing Security Workshop (CCSW),2015. pp. 31</p><p>42. </p><p>[3] N. Cao, S. Yu, Z. Yang, W. Lou, and Y. T. Hot, LT Codes based Secure and Reliable Cloud Storage </p><p>Service, in Proc.IEEE International Conference on </p><p>Computer Communications (INFOCOM),2014. </p><p>[4] S. D. C. di Vimercati, S. Foresti, S. Paraboschi, G. Pelosi,and P. Samarati, Efficient and Private Access </p><p>to Outsourced Data, in Proc. IEEE International </p><p>Conference on Distributed Computing Systems </p><p>(ICDCS), 2013, pp.710719. </p><p>[5] Y. Zhu, H. Wang, Z. Hu, G.-J. Ahn, H. Hu, and S. S.Yau,Dynami Audit Services for Integrity </p><p>Verification of Outsourced Storage in Clouds, in Proc. </p><p>ACM Symposium on Applied Computing (SAC), 2015, </p><p>pp. 15501557. </p><p>[6] S. Yu, C. Wang, K. Ren, and W. Lou, Achieving Secure,Scalable, and Fine-grained Data Access Control </p><p>in Cloud Computing, in Proc. IEEE International </p><p>Conference on Computer Communications </p><p>INFOCOM), 2014, pp. 534542. </p></li></ul>

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