Cryptography: Technologies for Securing Data and Communications
Cryptography plays a central role in protecting information across digital networks, from personal data to national security systems. This course examines how encryption technologies have evolved, how they are applied today, and what challenges they present for policymakers, businesses, and global cybersecurity.
What you will learn
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Analyze the impact of historical developments on contemporary cryptographic practices.
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Examine how encryption works to ensure the security and safety of an exchange of data between parties, particularly private transmissions.
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Evaluate the role of cryptography in enhancing cybersecurity measures.
Course content
What is Cryptography?
Understand distinctions and techniques in cryptology, cryptography, coding, and ciphering, and recognize their historical development and motivations.
The Future of Cryptography
Explore advanced encryption methods, post-quantum cryptography, and assess government involvement in encryption standardization.
Cryptography and Policy
Explore encryption regulations, dual-use goods export controls, and the issues with cryptographic backdoors.
Your Course Director

Dr. Eugene H. Spafford
Executive Director Emeritus of the Purdue University Center for Education and Research in Information Assurance and Security (CERIAS)
Eugene H. Spafford is one of the senior, most recognized leaders in the field of computing. His research and development work, including work with his students, underlies cyber security mechanisms in use on millions of systems in use today, including work in firewalls, intrusion detection, vulnerability scanners, integrity monitoring, forensics, and security architectures. Professor Spafford has been honored with every significant award in cyber security, including induction into the Cyber Security Hall of Fame; every major award at Purdue University for teaching; and many major awards for distinguished service to the computing community, including the CRA Distinguished Service Award. He is one of only two people to receive all three of the National Computer Security Award, be inducted into the Cyber Security Hall of Fame, and receive the Hal Tipton Award. He is also the only person ever to be named as a Fellow of the combination of the (ISC)2, ISSA (as a Distinguished Fellow), ACM, IEEE. American Association for the Advancement of Science (AAAS), and American Academy of Arts and Sciences (AAA&S).
Spaf (as he is widely known) has established an on-going record of accomplishment as a senior advisor and consultant on issues of security and intelligence, education, cybercrime and computing policy to a number of major companies, law enforcement organizations, academic and government agencies, including Microsoft, Intel, Tripwire, SignaCert, Unisys, the US Air Force, Sandia National Laboratory, Los Alamos National Laboratory, the National Security Agency, the GAO, the Federal Bureau of Investigation, the National Science Foundation, the Department of Justice, the Department of Energy, and the staff of two Presidents of the United States. With four decades of experience as a researcher and instructor, Professor Spafford has worked in software engineering, reliable distributed computing, host and network security, digital forensics, computing policy, and computing curriculum design. He is responsible for a number of "firsts" in several of these areas.
Dr. Eugene H. Spafford is a professor with primary appointment in Computer Science at Purdue University, where he has been a member of the faculty since 1987. He also has courtesy appointments as a professor of Philosophy, a professor of Communication, a professor of Electrical and Computer Engineering, and a professor of Political Science. He is the Executive Director Emeritus of the Purdue University Center for Education and Research in Information Assurance and Security (CERIAS). In 2012 he was named as one of Purdue's inaugural Morrill Professors -- the university's highest award for faculty. Starting in 2010, Spaf became Editor-in-Chief of the Elsevier journal Computers & Security , the oldest journal in the field of information security, and the official outlet of IFIP TC-11. Prior to this appointment, he served as Academic Editor (Associate Editor) of the journal from 1998–2009. Dr. Spafford is a member and past chair of the ACM's US Technology Policy Committee (formerly the US Public Policy Council) and was a member of ACM Council from 2012-2020. He is a member of Verified Voting's Board of Advisors. He is (again) a member of the Board of Directors for the Computing Research Association.
