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A two stage encryption algorithm based on DNA sequence has proposed in this paper. In the first stage an encryption of plain text is done by generating a random key. The plain text is again encrypted to produce the cipher text in the second stage. Moreover, this encryption algorithm is based on a symmetric key cryptography system, where we provide a shared key to encrypt as well as decrypt the intended message. To encrypt the original key two stages are maintained and sending it over a separate secure channel other than the channel through which we are transferring the cipher text. A numerical study confirms that the proposed algorithm is reliable, secure, scalable, and robust for transmitting message.

Recently, Cloud computing is most powerful research area because of its flexibility and cost efficiency. The paper describes different security issues of cloud computing and the possible solution for remediation.