Udacity

Applied Cryptography (Udacity)

Offered by Udacity,

Science of Secrets. Cryptography is present in everyday life, from paying with a credit card to using the telephone. Learn all about making and breaking puzzles in computing.

Class Deals by MOOC List - Click here and see Udacity's Active Discounts, Deals, and Promo Codes.

Explore how secrets are written and shared, as well as what can go wrong when cryptography is misused or implemented badly.

What You Will Learn

Lesson 1
Perfect Ciphers

What makes certain ciphers perfect.
How the Lorenz Cipher was broken.

Lesson 2
Symmetric Encryption

Sending messages when two people share a secret.

Lesson 3
Key Exchange

Techniques to establish a shared secret.

Lesson 4
Asymmetric Encryption

Exchanging information using public key cryptosystems.

Lesson 5
Public Key Protocols

Encrypted key exchange
certificates
secure commerce.

Lesson 6
Using Cryptographic Primitives

How cryptography can be useful for anonymizing communication
voting
and digital cash.

Lesson 7
Secure Computation

Computing without exposing data.

Prerequisites and Requirements
This course assumes previous programming experience, comparable to what is covered by the Udacity CS101 course, as well as some understanding of probability and theory of computation and algorithm analysis.

Go to Class

MOOC List is learner-supported. When you buy through links on our site, we may earn an affiliate commission.

Related Courses

Coursera

Johns Hopkins University

Healthcare Data Security, Privacy, and Compliance (Coursera)

Health & Society

In the final course of the Healthcare IT Support program, we will focus on the types of healthcare data that you need to be aware, complexities of security and privacy within healthcare, and issues related to compliance and reporting. As a health IT support specialist, you’ll be exposed to different types of data sources and data elements that are utilized in healthcare. It’s important for you to understand the basic language of healthcare data and for you to recognize the sensitive nature of protected health information (PHI). Maintaining data privacy and security is everyone’s responsibility, including IT support staff!

Oct 12th 2026

4 Weeks

Healthcare Law Encryption

Coursera

University of Colorado System

Basic Cryptography and Programming with Crypto API (Coursera)

Security & Networking

In this MOOC, we will learn the basic concepts and principles of crytography, apply basic cryptoanalysis to decrypt messages encrypted with mono-alphabetic substitution cipher, and discuss the strongest encryption technique of the one-time-pad and related quantum key distribution systems. We will also learn the efficient symmetric key cryptography algorithms for encrypting data, discuss the DES and AES standards, study the criteria for selecting AES standard, present the block cipher operating modes and discuss how they can prevent and detect the block swapping attacks, and examine how to defend against replay attacks.

Oct 12th 2026

4 Weeks

Programming Cryptography Network Security

Udacity

Udacity,Facebook

Secure and Private AI (Udacity)

Data Science

Learn how to extend PyTorch with the tools necessary to train AI models that preserve user privacy. This free course will introduce you to three cutting-edge technologies for privacy-preserving AI: Federated Learning, Differential Privacy, and Encrypted Computation. You will learn how to use the newest privacy-preserving technologies, such as OpenMined's PySyft. PySyft extends Deep Learning tools—such as PyTorch—with the cryptographic and distributed technologies necessary to safely and securely train AI models on distributed private data.

Self Paced

Self-Paced

Cryptography Artificial Intelligence Security

Udacity

Georgia Institute of Technology,Udacity

Intro to Information Security (Udacity)

Security & Networking

Offered at Georgia Tech as CS 6035. This course provides a one-semester overview of information security. It is designed to help students with prior computer and programming knowledge — both undergraduate and graduate — understand this important priority in society today. The technical content of the course gives a broad overview of essential concepts and methods for providing and evaluating security in information processing systems (operating systems and applications, networks, protocols, and so on).

Self Paced

Self-Paced

Cryptography Security Networks

Coursera

University of London

Introduction to Applied Cryptography (Coursera)

Computer Science

This course is a non-mathematical introduction to the role that cryptography plays in providing digital security for everyday applications such as the internet, mobile phones, wireless networks and cryptocurrency. In this introductory course you will develop an understanding of the functionality and purpose of the main cryptographic tools we use today. You will learn how to make decisions about which cryptographic tools are most appropriate to deploy in specific settings. You will also explore the wider infrastructure surrounding cryptography and how this impacts the overall security of systems deploying cryptography.

Oct 12th 2026

4 Weeks

Cryptography Security Digital Security

Coursera

University of Maryland, College Park

Cryptography (Coursera)

Security & Networking

This course will introduce you to the foundations of modern cryptography, with an eye toward practical applications.

Oct 19th 2026

5-12 Weeks

Cryptography Security Number Theory

Coursera

University of London

Cyber Security Fundamentals (Coursera)

Security & Networking

This course is intended to provide a general introduction to key concepts in cyber security. It is aimed at anyone with a good general knowledge of information and communications technology. The nature, scope and importance of cyber security are explained, and key concepts are justified and explored. This includes examining the types of threat that cyber security must address, as well as the range of mechanisms, both technological and procedural, that can be deployed.

Oct 18th 2026

3 Weeks

Cryptography Security Information Security

Coursera

Microsoft

Secure Your Data at Rest (Coursera)

CS: Information & Technology

Secure Your Data at Rest is the fifth course in the Microsoft Azure Security Engineer Associate Professional Certificate training program. This course teaches storage security, data sovereignty, database monitoring, encryption, data masking, and using Defender for Cloud for advanced threat protection. You must secure data at rest as this will safeguard sensitive information, prevent unauthorized access, meet regulatory compliance, and ensure data confidentiality and integrity.

Oct 12th 2026

5-12 Weeks

Encryption Azure SQL Database SAS

Coursera

INSEAD

Introdução às Tecnologias Blockchain (Coursera)

Business

Nesse primeiro curso de especialização, discutiremos as limitações da internet para os negócios e atividades econômicas, e explicaremos como a tecnologia blockchain representa o caminho ara evoluir. Depois de completar esse curso, você será capaz de explicar como a blockchain é, como funciona, e porque é revolucionária.

Oct 12th 2026

5-12 Weeks

Business Cryptography Mining

Coursera

University of California, San Diego,Higher School of Economics - HSE University

Number Theory and Cryptography (Coursera)

CS: Software Engineering CS: Theory

We all learn numbers from the childhood. Some of us like to count, others hate it, but any person uses numbers everyday to buy things, pay for services, estimated time and necessary resources. People have been wondering about numbers’ properties for thousands of years. And for thousands of years it was more or less just a game that was only interesting for pure mathematicians. Famous 20th century mathematician G.H. Hardy once said “The Theory of Numbers has always been regarded as one of the most obviously useless branches of Pure Mathematics”. Just 30 years after his death, an algorithm for encryption of secret messages was developed using achievements of number theory. It was called RSA after the names of its authors, and its implementation is probably the most frequently used computer program in the word nowadays.

Oct 12th 2026

4 Weeks

Cryptography Algorithms Arithmetic

Coursera

University of Colorado System

Cryptography and Information Theory (Coursera)

Security & Networking

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 contrasts information-theoretic security and computational security to highlight the different train of thoughts that drive the cryptographic algorithmic construction and the security analyses.

Oct 12th 2026

4 Weeks

Cryptography Networks Information Theory

Coursera

University of Cape Town

How Entrepreneurs in Emerging Markets can master the Blockchain Technology (Coursera)

Economics & Finance Business

In this course, you will gain a thorough understanding of the blockchain and distributed ledger technologies, including an introduction to the necessary foundations in cryptography. The course will discuss blockchain as a distributed ledger and introduce distributed consensus as a mechanism to maintain the integrity of the blockchain. The other revolutionary technologies that are changing the world as we speak are artificial intelligence and machine learning. You will learn about the three major types of AI algorithms: supervised and unsupervised machine learning, as well as reinforcement learning.

Oct 12th 2026

4 Weeks

Cryptography Artificial Intelligence Fintech