Enhancing Data Security Using AES Encryption Algorithm in Cloud Computing

Cloud Computing offers computation as per utility of the customer and hence it is known as utility computing. This model is attractive mainly for business oriented people because it reduces total cost of operation, maintainance cost, increases return of investment. But the only thing that is impeding popularity of cloud computing is security issues. This paper discuss about AES encryption algorithm (RIJNDAEL) that secure data stored on cloud. This method is more efficient than DES which is symmetry based algorithm and offers 56 bits key size whereas RIJNDAEL algorithm is asymmetry and offers 128 bits key and 128 bits blocks. RIJNDAEL is block cipher algorithm and is secure against cryptanalytic attacks. It is versatile, which means it can be implemented on different working environment efficiently, its key agility is good which means setup time of key is less and this algorithm is easy to be understood and using it. Rijndael requires less memory and hence make it is well suited for environments which have less space such as 8 bit micro-processor, also it shows marvellous performance in terms of software and hardware implementation.