The historical evolution of cryptography

In a 6 page paper, please discuss the historical evolution of cryptography and how the-practice of cryptology has adapted to evolving technologies. What is the difference between encryption in the 1930’s vs. the 1970s to today? Include a discussion of the transition from mechanical to digital encryption methods/technologies and the impact upon modern communications. Develop the paper in accordance with APA formatting, 3-5 references, figures, and graphs.No cover pages or abstracts are required.