In this digital world, e-business has gained more popularity, but it is associated with many security issues. The various risks related to online business include transaction risks, data storage risks, privacy risks and transmission risks. In this paper, an unified approach has been proposed to provide enhanced security over e-business transactions with a detailed performance analysis of various cryptographic algorithms. The performance of the proposed approach is studied by conducting various experiments on a real world problem, and an optimal algorithm has been suggested that has minimum transmission risk. © International Science Press.