Data Security in Cloud through Confidentialit and Authentication

Cloud computing is new computing paradigm that lays on concept of sharing of recourses rather than having local server or personal devices to handle applications. Current issues in cloud are the data modified by administrator having malicious nature or uploading virus affected file on cloud. There is a possibility of an attack while uploading a file on cloud. Different encryption algorithms are used to secure the data in cloud. To provide more security on data from attacker one can choose authentication technique with encryption algorithm. In this paper, various techniques for protecting data using above discussed method are listed. Amongst all technique application of encryption algorithm with the authentication is giving best results. All the discussed techniques are implemented by a researchers on a cloud like test bad and encrypt the data using AES encryption algorithm and authenticate data using Digital Signature is better in all technique.