The widespread use of cryptography is a necessary consequence of the information revolution. With the coming of electronic communications on computer networks, people need a way to ensure that conversations and transactions remain confidential. Cryptography provides a solution to this problem, but it has spawned a heated policy debate. Some government agencies want to restrict the use of data encryption because they fear that criminals and spies may use the technology to their own advantage. However, Encryption Techniques so far have both advantages and disadvantages to society, and issues about abuse require a formularized policy.