International Journal of Scientific Research and Engineering Development-– Volume 3 Issue 2, Mar-Apr 2020 Available at www.ijsred.com ISSN : 2581-7175 ©IJSRED: All Rights are Reserved Page 948 A Review Paper on “Data security issues in cloud computing” Gagandeep Kaur Asstt. Professor, CSE Department, Shri Rawatpura Sarkar University, Raipur (C.G.), kgagan619@yahoo.com Abstract- Cloud computing offers a prominent provider for facts garage called cloud storage. The go with the flow and garage of facts on the cloud environment in simple textual content format can be main protection threat. So, it is the duty of cloud provider vendors to make certain private and protection of facts on storage in addition to network level. The following three parameters confidentiality, integrity and availability determine whether protection and private of statistics saved on cloud environment is maintained or not. The proposed work is to outline cloud structure with configured samba storage and cryptographic encryption techniques. The cloud architecture deployed with samba storage makes use of operating gadget feature specifying permission values for 3 attributes (User/Owner, Group and Global) and maps it to cryptographic utility which plays cryptographic operations. Cryptography software supports symmetric and uneven encryption algorithm to encrypt/decrypt data for uploading/downloading within cloud storage. A username and password based totally authentication mechanism for users and virtual signature scheme for information authenticity are defined inside cloud architecture. Keywords- Cloud computing security, Cloud storage, Symmetric and asymmetric cryptosystem, AES, ECC, SHA, Samba Server, Cryptographic Application. I .INTRODUCTION Cloud computing is a disbursed computing fashion which give integration of internet services and statistics centres. There are several predominant cloud computing carriers such as Amazon, Google, Yahoo, Microsoft and others which might be imparting cloud computing offerings. Amazon internet services became first to provide an structure for cloud based totally services in 2002 and after that improvements and new models for cloud structure were proposed and implemented. There have been many strategies of storing records on server storage. Such statistics storages supplied by means of cloud carrier carriers have to ensure consumer approximately Confidentiality, Integrity and Availability of statistics. Confidentiality: Confidentiality refers to keeping records private. Privacy is of importance as facts leaves the borders of the owner. Confidentiality is supported by technical gear inclusive of encryption and get right of entry to manipulate, as well as prison protection. Integrity: Integrity is a degree of self assurance that what statistics is meant to be in cloud, what is honestly there, and is protected against unintentional or intentional alteration without authorization. Availability: Availability manner being capable of use the device as predicted by means of cloud consumer. Cloud technologies can growth availability through full-size internet-enabled get entry to, but the consumer is dependent on the well timed and sturdy provision of resources. Availability is supported through capability constructing and precise architecture by way of the provider, in addition to well-defined contracts and terms of agreement. Cloud statistics garage safety addresses the want of enforcing selective information get admission to by using providing an method that helps the user in specification of access regulations and safety measures. Cloud Storage: Cloud garage [1] specifies the garage on cloud with almost inexpensive garage and backup option for small enterprise. The real garage location can be on single garage environment or replicated to a couple of server storage based totally on importance of information. Typical cloud storage machine architecture includes a master control server and various clients. The mechanism model of cloud storage consists of four layers: storage layer which shops the records, simple control layer which ensures safety and balance of cloud garage itself, software interface layer which affords utility provider platform, and get admission to layer which gives the access platform. The fundamental cloud garage environment represented as follows: Figure 1: Cloud Storage Environment. RESEARCH ARTICLE OPEN ACCESS