## 1 Introduction  
Attribute-based encryption (ABE) is a popular cryptographic technology to protect the security of users' data in cloud computing. Cloud computing is one of the biggest areas because of its high-level features such as convenience, scalability, and cost-saving. Due to its vulnerability, the development of the security model is very difficult. Consequently, the economic benefit and availability will be affected [1; 2]. The attacker constructs the attacks in mobile application and devices in that place develop the hypervisor to destroy the virtual machine (VM) side-channel attack and denial-of-service (DOS) attack. Cloud computing will be affected by the presence of traffic, in which case IP addresses are used to eliminate the traffic [3]. The data collaboration service, as a promising service offered by the cloud service provider (CSP), is to support the availability and consistency of the shared data among users. In cloud storage devices, data are stored among multiple users, not only in the cloud. A technique like privacy-preserving is used to allow public auditing through this way. The data will be stored, the integrity of shared data will be checked, and then the information will be verified by the ring structures. The shared data have a number of blocks containing the signer identity and the information are kept secret from third parties until the verification of shared information [4]. An organization has owners, and users can store data in the cloud and check the data for security purposes. In cloud computing systems, strong security obstacles and privacy issues are adapted in which related terms like confidentiality, integrity, control, audit, and availability are provided to secure the data [5]. In order to secure the stored data by the decentralized access control scheme in which the stored information can be decrypted by the valid users and the key distribution process by manner of decentralized way. All files or records will be stored in the cloud by access policy, which is known by the cloud [6]. The network security attackers are \"viruses, trojan horses, man in the middle attacks, back doors, denials of service\" and so on. In order to obtain flexibility and economic savings, the local sites are transformed to the commercial public cloud and it will be motivated by the data owners to outsource the complex data [7; 8]. Before storing the information on the cloud, the cloud checks the authenticity of the user without the estimation of the user's identity. The valid users can decrypt the stored data and then support modification, creation, and reading the data due to the prevention of replay attacks [9; 10]. The cloud computing environments assure data confidentiality and access control methods to utilize key policy ABE and proxy re-encryption. To avoid collision attacks in this method, the data file into header and body is divided [11; 12]. The data are to be stored in the cloud, where traditional security is not well suited. The cloud data will be more secure from duplication. The static and dynamic-based tree structures are constructed here for securing the data. The random elements are collected from the client by static tree structures [13]. By the use of cryptographic secret-sharing, the secured data are transmitted across multiple clouds from which the data can be accessed by attribute-based encryption. The issues like hacking threats, internally or externally, infeasibility of encrypting data. For this purpose, the user is permitted for data encryption by employing key-based techniques to provide confidentiality [14; 15]. For security purposes, the digital signature with an Rivest-Shamir-Adleman (RSA) algorithm has been explored to the cloud data and it authenticates the digital message. The anonymity of the user is guaranteed by the combined scheme of attribute based signature (ABS) and group signature in which the private key protects attribute authorities [16; 17].