Sang-Yoon Chang

I am an assistant professor at the Computer Science department at University of Colorado Colorado Springs (UCCS). I research in computer security and computer network focusing on wireless network, edge computing, and cyber-physical systems. My research also has high synergy with the developments of internet of things (IoT) and cyber-physical systems.

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Cryptography and Information Theory (Coursera)

This course combines cryptography (the techniques for protecting information from unauthorized access) and information theory (the study of information coding and transfer). More specifically, the course studies cryptography from the information-theoretical perspectives and discuss the concepts such as entropy and the attacker knowledge capabilities, e.g., Kerckhoff's Principle. It also [...]
Average: 9 (4 votes)

Cryptographic Hash and Integrity Protection (Coursera)

This course reviews cryptographic hash functions in general and their use in the forms of hash chain and hash tree (Merkle tree). Building on hash functions, the course describes message authentication focusing on message authentication code (MAC) based on symmetric keys. We then discuss digital signatures based on asymmetric [...]
Average: 6 (4 votes)

Asymmetric Cryptography and Key Management (Coursera)

In asymmetric cryptography or public-key cryptography, the sender and the receiver use a pair of public-private keys, as opposed to the same symmetric key, and therefore their cryptographic operations are asymmetric. This course will first review the principles of asymmetric cryptography and describe how the use of the pair [...]
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Symmetric Cryptography (Coursera)

Welcome to Symmetric Cryptography! Symmetric cryptography relies on shared secret key to ensure message confidentiality, so that the unauthorized attackers cannot retrieve the message. The course describes substitution and transposition techniques, which were the bases for classical cryptography when the message is encoded in natural language such as English. [...]
Average: 5 (4 votes)

Mathematical Foundations for Cryptography (Coursera)

Welcome to Course 2 of Introduction to Applied Cryptography. In this course, you will be introduced to basic mathematical principles and functions that form the foundation for cryptographic and cryptanalysis methods. These principles and functions will be helpful in understanding symmetric and asymmetric cryptographic methods examined in Course 3 [...]
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Classical Cryptosystems and Core Concepts (Coursera)

Welcome to Introduction to Applied Cryptography. Cryptography is an essential component of cybersecurity. The need to protect sensitive information and ensure the integrity of industrial control processes has placed a premium on cybersecurity skills in today’s information technology market. Demand for cybersecurity jobs is expected to rise 6 [...]
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