Computing Of Data And Homomorphic Encryption Essay

A company allows its staffs in the same groupor department to store and share files in the cloud. By utilizing the cloud, the staffs can be completely released from the troublesome local data storage and maintenance.However, it also poses a significant risk to the confidentialityof those stored files. Specifically, the cloud serversmanaged by cloud providers are not fully trusted by userswhile the data files stored in the cloud may be sensitive andconfidential, such as business plans. To preserve dataprivacy, a basic solution is to encrypt data files, and thenupload the encrypted data into the cloud. Unfortunately,designing an efficient and secure data sharing scheme forgroups in the cloud is not an easy task due to the followingchallenging issues.First, identity privacy is one of the most significantobstacles for the wide

“Cloud computing is a term used to describe a set of IT services provided to a customer over a network on a leased basis and with the ability to scale up or down their service requirements. Usually cloud computing services are delivered by a third party provider who owns the infrastructure” [1]. Cloud computing has enabled its users to make computing resources a utility. In the near future, people will be able to get all the resources they need by connecting to the cloud via an Internet connection. In addition, storage, process power and memory capacity will be scaled on demand. The merits of cloud computing are plenty and so are its drawbacks. Of the most important concerns linked to cloud computing are these around its security risks.

Users, resources, and the CLOUD should establish the trustful relationship among themselves. And they will be able to deal with the changing dynamically. The CLOUD includes distributed users and resource from distributed local systems or organizes, which have different security policies. According to this reason, how to build a suitable relationship among them is a challenge. In fact, the requirements for the security in cloud computing environment have some aspects, including confidentiality.

We consider a cloud computing environment consisting of a cloud service provider (CSP), a data owner, and many users [few with read and few with both read/write permission]. The CSP maintains cloud infrastructures, which pool the bandwidth, storage space, and CPU power of many cloud servers to provide 24/7 services. The CSP mainly provides two services: data storage and re-encryption. After obtaining the encrypted data from the data owner, the CSP will store the data. On receiving a data access request from a user, the CSP will re-encrypt the ciphertext based on attributes, and return the re-encrypted ciphertext.

Cloud Computing is a new paradigm in which computing resources:(i) Processing, (ii) Memory and (iii) Storage are not physically present at the user’s location. The proposed system will create the multiple users to monitor and handle the data integration physically in the Third Party Auditor (TPA). A utilization of homomorphic linear authenticator and random mask will guarantees that the TPA will unable to retrieve any information / data content stored in the cloud server during auditing process. In the proposed work, the reinforcement of TPA handles multiple audit sessions from an outsourced data files and extend the existed Privacy-Preserving Public Auditing Protocol (P3AP) into an Multi-User Public Auditing Protocol (MUPAP). It performs an efficient Multiple Auditing Tasks (MAT) to typically eliminate the burden of tedious and expensive auditing task and improves outsourced data leakage

The author in [20], proposed a fully homomorphic encryption scheme – i.e., a scheme that allows one to evaluate circuits over encrypted data without being able to decrypt. Presented solution comes

ABSTRACT: Cloud computing is a method of providing a set of shared computing resources that includes applications, computing, storage, networking, development, and deployment platforms as well as business processes. In cloud computing, data while transferring as well as storage, and get data back when it is needed there is no assurance about the security of that data stored and also it is not changed by the cloud or TPA. Therefore Security and control over data remain to play a significant role in plans for cloud computing initiatives. Existing research work earlier grant data integrity to be verified,but still there are different drawbacks, firstly basic and mostly needed authorization/authentication process is not present in between Cloud Service provider and TPA. Techniques like authentication and encryption are important, our system can provides those things for security issues. Second: in recent research POR protocol in which the verifier stores only a single cryptographic key, POR can only capable of detection of file corruption or loss, and not prevention. Maintaining the storages can be a tough task and second it requires high resource costs for the implementation. This paper, Propose a formal analysis method called full

Keeping data secure is vital in cloud computing and companies to ensure that their clients are protected.

Confidentiality opt to keep big data secret in cloud computing for unauthorized access, in our model we are willing to keep data secret even from the cloud service provider, therefore we propose to encrypt data before send it to the cloud, the encryption method is discussed below.

Ranked search over encrypted data were proposed to enable quick search of the most relevant document which can effectively reduce network traffic but most are designed only for single keyword search. \citep{enable} proposed a scheme that allows users to search encrypted data on the cloud by using keywords securely. The scheme allows users to scan an entire document and a list of keywords will be extracted from the document that will be used to build searchable index. The scheme requires huge computation to enable

To study a system which will help to secure data stored on the cloud storage system. This system may be helpful to for users who wants secure thier data as well as for companies who wants to give access permission to limited data to their employees and secure their data in cloud storage system.

Cloud computing platform is vulnerable to security due to shared computing resources between multiple users. Also cloud computing resources are installed and managed by cloud providers. So cloud providers can have access to the confidential data. Data breaches can occur due to stealing or modifying important data by the harmful cloud providers. So data security, confidentiality and integrity can be problematic when cloud computing services are used[1]. Organizations can use Cryptographic techniques and Encrypted File System (EFS) to do data encryption for the security. Public keys are used for the encryption and decryption of the data by EFS. These keys are stored in the disk of the computer. So EFS is not a good option to use for the data security in the cloud. System administrators can have

Abstract:Cloud computing is a paradigm in which services (Iaas,Paas,Saas) are rented to the user as per demand.But data security is main issue when we are using public cloud service provider.whether the confidential data kept on the central storage on cloud is secure?

In order to overcome the security problems faced by cloud computing a new technology known as Homomorphic encryption is being put to use. It is a type of encryption that allows all the computational process to be made available to carry on cryptographic which is one on a plain text using an algorithm. This is one of the most improved and effective technique used in today’s architecture that is related to communication systems. This encryption combined all the different services that are needed together without letting out the data to any of these services. This homomorphic encryption data can be transferred into cryptographic encryption by altering the design. This change allows their encryption to be used in cloud computing

Abstract: Cloud technology is very constructive and usefulin present new technological era, where a person uses the internet and the remote servers to give and maintain data as well as applications. Such applications in turn can be used by the end users via the cloud communications without any installation. Moreover, the end users‟ data files can be accessed and manipulated from any other computer using the internet services. Despite the flexibility of data and application accessing and usage that cloud computing environments provide, there are many questions still coming up on how to gain a trusted environment that protect data and applications in clouds from hackers and intruders. Cloud storage should be able to store and share data securely, efficiently, and flexibly with others in cloud storage. The costs and complexities involved generally increase with the number of the decryption keys to be shared. The encryption key and decryption key are different in public key encryption. Since we are proposing new era of Aggregate key cryptography. To produce constant length ciphertext is also one of important task that we have materialized. In this paper, we propose a simple, efficient, and publicly verifiable approach to ensure cloud data security while sharing between