Recently, many organizations and industries are using the cloud computing technologies for exchanging the resources and their confidential data. For this purpose, many cloud services are available and also provide the facility to categorize their users as private and public users for accessing their own data from private cloud and public cloud. The combination of these two clouds is called federated cloud which facilitates to allow both kinds of cloud users for accessing their own data on same cloud database. In this scenario, the authorization and authentication process is becoming complex task on cloud. For providing the facility to access their own data only from federated cloud, a new secured data storage and retrieval algorithm called AES and Triple-DES-based Secured Storage and Retrieval Algorithm (ATDSRA) are proposed for storing the private and public cloud user’s data securely on cloud database. Here, the TDES is used for encrypting the input data, data merging and aggregation methods were used for grouping the encrypted input data. Moreover, a new dynamic data auditing scheme called CRT-based Dynamic Data Auditing Algorithm (CRTDDA) is proposed for conducting the cloud data auditing over the federated cloud and also restricting the data access. The proposed new auditing mechanism that is able to protect the stored data from access violence. In addition, the standard Table64 is used for encryption and decryption processes. The experimental results of this work proves the efficiency of the proposed model in terms of security level.

中文翻译：

---

在联邦云中提供分布式服务的有效数据存储和动态数据审计方案

最近，许多组织和行业正在使用云计算技术来交换资源及其机密数据。为此，可以使用许多云服务，并提供将用户分类为私有和公共用户的工具，以便从私有云和公共云访问他们自己的数据。这两种云的组合称为联合云，它有助于允许两种云用户访问同一云数据库上的自己的数据。在这种情况下，授权和身份验证过程正在成为云上的复杂任务。为了提供仅从联合云访问他们自己的数据的设施，提出了一种新的安全数据存储和检索算法，称为 AES 和基于三重 DES 的安全存储和检索算法 (ATDSRA)，用于将私有云和公共云用户的数据安全地存储在云数据库中。这里，TDES 用于加密输入数据，数据合并和聚合方法用于对加密的输入数据进行分组。此外，提出了一种新的动态数据审计方案，称为基于 CRT 的动态数据审计算法（CRTDDA），用于在联合云上进行云数据审计并限制数据访问。提议的新审计机制能够保护存储的数据免受访问暴力。此外，标准Table64用于加密和解密过程。