International Journal of advanced studies in Computer Science and Engineering

Pay as per usage concept of Cloud computing has brought revolutionary changes in the information technology world. Cloud computing is now the need of changing technological scenario and even more service consumers are adopting it every day. One of the most fascinating features of cloud is that, from small scale to large scale, it is beneficial for all types of organizations. It has offered several advantages to the society, but at the same time many organizations are still reluctant towards the adoption of this technological innovation, and unfortunately the reason is true. The security concerns of cloud network are even increasing along with today’s growing cloud service consumers. These security concerns can be resolved by using proper security mechanism. In this paper we have analyzed the performance of some popular cryptographic algorithms for the cloud network, namely; Symmetric Algorithms, Asymmetric Algorithms, Hash algorithms and Homomorphic Algorithms. Homomorphic Algorithms are relatively newer than other categories, but these algorithms will be having wide application in near future, especially in the untrusted environment like cloud computing. We have conducted the comparative study in between two most popular algorithms of each category; AES vs. DES, RSA vs. ELGAMAL, MD5 vs. SHA, Paillier vs. Benaloh, so that performance wise better algorithms can be concluded for the cloud network. The algorithms are tested on the single system and on the cloud environment as well.