Abstract: Cloud computing allows for on-demand entry to shared property. It enables to utilize records and purposes over the web. Since they share the information through the net, security is regarded as a major issue so that Cloud computing services need to address the security in the coursework of the transmission of sensitive information and critical applications to shared and public cloud environments. The cloud computing supports distributed services multi-domain Infrastructure, and multi-users. This paper has presented the concept of secure authenticated information and secure cloud storage to deal with security issues that occurs in cloud as a result of malicious activities of attacker.

Keywords: Encryption, Decryption, Digital Signature, DSA, Data Security.