Performance Analysis of PBlock Algorithm Implemented Using SIMD Model to Attain Parallelism

Software applications are driving the growth of cloud computing era. The security of data over the networks is essential in order to enable cloud computing applications. The security of data is ensured through the use of various types of encryption algorithms. In the current cloud computing era we are witnessing the use of multi core processors which has enabled us to run security applications, simultaneously at both client and the server end. The encryption as well as decryption process of security algorithms is compute intensive and can take significant benefit from parallel implementations that can run on these multi core processors. Moreover these algorithms will consume more energy on uniprocessor systems due to the massive calculations they do, because there is a non-linear relationship between frequency of a core and power supply. This paper introduces a parallel version of Blowfish algorithm using Single Instruction Multiple Data model which is named as PBlock and its implementation on a Symmetric Multi Processor machine along with the results of performance gains that we have obtained on a number of benchmark examples.