Instructor: Dan Boneh, Stanford University
Online cryptography course preview: This page contains all the lectures in the free cryptography course. To officially take the course, including homeworks, projects, and final exam, please visit the course page at Coursera.
Textbook: The following is a free textbook for the course. The book goes into more depth, including security proofs, and many exercises.
Course syllabus, videos, and slides
Week 1: Course overview and stream ciphers (chapters 2-3 in the textbook)
Slides for week 1:
Introduction: pdf pptx
Stream ciphers: pdf pptx
What is cryptography?
Crash course in discrete probability
Stream Ciphers 1: the one-time pad and stream ciphers
Stream Ciphers 2: attacks and common mistakes
Stream Ciphers 3: real-world examples
Stream Ciphers 4: what is a secure cipher?
Week 2: Block ciphers (chapters 4-5 in the textbook)
Slides for week 2:
Block ciphers: pdf pptx
Using block ciphers: pdf pptx
Block Ciphers 1: overview
Block Ciphers 2: The Data Encryption Standard
Block Ciphers 3: AES and other constructions
How to Use Block Ciphers 1: one-time key
How to Use Block Ciphers 2: many-time key
Week 3: Message integrity (chapters 6-8 in the textbook)
Slides for week 3:
Message integrity: pdf pptx
Collision resistant hashing: pdf pptx
Message Integrity 1: definitions
Message Integrity 2: constructions
Collision Resistance 1: what is a collision resistant function?
Collision Resistance 2: constructions
HMAC: a MAC from a hash function
Week 4: Authenticated encryption (chapter 9 in the textbook)
Slides for week 4:
Authenticated encryption: pdf pptx
Odds and ends: pdf pptx
Authenticated Encryption 1: why is it so important?
Authenticated Encryption 2: standard constructions
Authenticated Encryption 3: pitfalls
Odds and Ends 1: how to derive keys
Odds and Ends 2: searching on encrypted data
Odds and Ends 3: disk encryption and creditcard encryption
Week 5: Basic key exchange (chapter 10 in the textbook)
Slides for week 5:
Basic key exchange: pdf pptx
Crash course in number theory: pdf pptx
Basic Key Exchange 1: problem statement
Basic Key Exchange 2: two solutions
Number Theory 1: modular arithmetic
Number Theory 2: easy and hard problems
Week 6: Public-key encryption (chapters 11-12 in the textbook)
Slides for week 6:
Trapdoor permutation: pdf pptx
Diffie-Hellman: pdf pptx
Public Key Encryption from Trapdoor Permutations
Public Key Encryption from Trapdoor Permutations: RSA
Public Key Encryption from Trapdoor Permutations: attacks
Public Key Encryption From Diffie-Hellman: ElGamal
Public Key Encryption: summary
Week 7: Digital signatures (chapters 13-14 in the textbook)
Slides for week 7:
Digital signatures: pdf pptx
Hash-based signatures: pdf pptx
Dan Boneh, professor of computer science and electrical engineering at Stanford University is offering a free online cryptography class starting in January.
Students will get about two hours of video content per week, though broken up into chunks of about 12 minutes (or smaller). They’ll also get quizzes from the videos and standalone quizzes, as well as programming assignments.
Here’s the description of the course:
Students will learn how to reason about the security of cryptographic constructions and how to apply this knowledge to real-world applications. The course begins with a detailed discussion of how two parties who have a shared secret key can communicate securely when a powerful adversary eavesdrops and tampers with traffic. We will examine many deployed protocols and analyze mistakes in existing systems. The second half of the course discusses public-key techniques that let two or more parties generate a shared secret key. We will cover the relevant number theory and discuss public-key encryption, digital signatures, and authentication protocols. Towards the end of the course we will cover more advanced topics such as zero-knowledge, distributed protocols such as secure auctions, and a number of privacy mechanisms. Throughout the course students will be exposed to many exciting open problems in the field.
A background in discrete probability is also said to be helpful. If you want a free course in crypt at your leisure, this sounds like a great option.
Boneh is the head of the applied cryptography group at Stanford, and has focused on applications of cryptography to computer security. He’s editor of the Journal of Cryptography and the Journal of the ACM.