During the last three decades, public academic research in cryptography has exploded. While classical cryptography has been long used by ordinary people, computer cryptography was the exclusive domain of the world’s militaries since the World War II. Today, state-of the-art computer cryptography is practiced outside the secured walls of the military agencies. The laypersons can now employ security practices that can protect against the most powerful adversaries. Since we live in an era of connected world with convergence of computer and networks, the need of information security and assurance is more than it had ever has been before. With the advent of rapidly advancing and amazing technologies that.
