As the data produced by the enterprises that need to be stored and utilized (e.g. emails, personal health records, photo albums, tax documents, financial transactions, etc.) is rapidly increasing, data user security are motivated to outsource their local complex data management systems into the cloud for its great flexibility and economic savings. Cloud storage allows consumers and businesses to use applications without installation and access their personal files at any computer with internet access. In cloud storage, the data will be stored in storage provided by cloud service provider (CSP’s). Also service provider must provide authentication for valid user otherwise security reduce and cloud system may collapse.The proposed system mainly focus on core secured cloud storage services i.e. Diffie Hellman Virtual Machine Based Cloud Security Cryptography to provide cryptographic techniques for securing data and computation in a cloud environment.Cryptography in cloud computing is a new secure service regarding security and privacy in cloud.