About this Course
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2 reviews

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Flexible deadlines

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Intermediate Level

Approx. 10 hours to complete

Suggested: 2-4 hours/week...

English

Subtitles: English

100% online

Start instantly and learn at your own schedule.

Flexible deadlines

Reset deadlines in accordance to your schedule.

Intermediate Level

Approx. 10 hours to complete

Suggested: 2-4 hours/week...

English

Subtitles: English

Syllabus - What you will learn from this course

Week
1
2 hours to complete

Cryptographic Hash Function

Cryptographic hash function is a fundamental building block in modern cryptography and is used for digital signature, message authentication, anomaly detection, pseudo-random number generator, password security, and so on. This module define cryptographic hash functions and contrast it with ordinary hash functions. It also describes the iterative structure for hash implementation to support the hash requirements. ...
7 videos (Total 19 min), 1 reading, 2 quizzes
7 videos
Module Objectives55s
Hash Function55s
Insecure Hash Function2m
Cryptographic Hash Function Requirements: One-Way and Collision Properties4m
Cryptographic Hash Function Security3m
Cryptographic Hash Function Structure2m
1 reading
Slides for Cryptographic Hash Function15m
1 practice exercise
Cryptographic Hash Function40m
Week
2
3 hours to complete

Cryptographic Hash Function Applications

Building on the previous module defining cryptographic hash functions, this module review its uses and applications. We will first describe hash chain, which chains multiple hash functions in sequence, and apply hash chain for generating one-time passwords using a scheme called S/Key. Then, we will use hash functions to construct a binary tree and describe hash tree, also known as Merkle tree. Lastly, we will review the applications of hash function and hash tree for decentralized digital currency in the forms of cryptocurrency or bitcoins. ...
5 videos (Total 14 min), 3 readings, 2 quizzes
5 videos
Hash Chain1m
S/Key: One-Time Password4m
Hash Tree (Merkle Tree)4m
Cryptocurrency and Bitcoin1m
3 readings
Lamport's scheme (S/Key)30m
Slides for Cryptographic Hash Applications15m
TESLA Broadcasting Authentication10m
2 practice exercises
Hash Chain and Hash Tree40m
Cryptocurrency and TESLA8m
Week
3
1 hour to complete

Message Authentication Code (MAC)

Message authentication is to protect the message integrity and to perform sender authentication. This module describes message authentication code (MAC) which is based on symmetric keys. It contrasts MAC with hash functions or general encryption/decryption techniques and quantify the brute force attack difficulty for MAC and discuss the security requirements for MAC. The module also reviews two MAC implementations in Data Authentication Algorithm (DAA) and Cipher-Based MAC (CMAC), which are based on the use of block ciphers....
7 videos (Total 16 min), 1 reading, 1 quiz
7 videos
Message Authentication Approaches and Using Symmetric Encryption for Message Authentication2m
Message Authentication Code (MAC)3m
Brute-Force Attack on MAC3m
MAC Requirements2m
Digital Authentication Algorithm (DAA)1m
Cipher-Based MAC (CMAC)1m
1 reading
Slides for Message Authentication Code15m
1 practice exercise
Message Authentication Code45m
Week
4
2 hours to complete

Digital Signature

Like physical signatures in paper transactions, digital signature provides sender authentication and non-repudiation. This module describes how to use public-key pair to ensure the source of the packet. Then, it describes the purpose of digital signatures and the corresponding requirements. Lastly, we review a digital signature construction, which is the basis for many digital signature implementations such as RSA signature and Digital Signature Standard (DSS). ...
5 videos (Total 8 min), 1 reading, 3 quizzes
5 videos
Alice Uses Her Private Key1m
Digital Signature Properties Beyond Message Authentication2m
Digital Signature Requirements1m
Digital Signature Constrcution1m
1 reading
Slides for Digital Signature15m
1 practice exercise
Digital Signature25m

Instructor

Avatar

Sang-Yoon Chang

Assistant Professor
Computer Science

About University of Colorado System

The University of Colorado is a recognized leader in higher education on the national and global stage. We collaborate to meet the diverse needs of our students and communities. We promote innovation, encourage discovery and support the extension of knowledge in ways unique to the state of Colorado and beyond....

About the Applied Cryptography Specialization

This specialization is intended for the learners interested in or already pursuing a career in computer security or other cybersecurity-related fields. Through four courses, the learners will cover the security of information systems, information entropy, classical cryptographic algorithms, symmetric cryptography, asymmetric/public-key cryptography, hash functions, message authentication codes, digital signatures, key management and distribution, and other fundamental cryptographic primitives and protocols....
Applied Cryptography

Frequently Asked Questions

  • Once you enroll for a Certificate, you’ll have access to all videos, quizzes, and programming assignments (if applicable). Peer review assignments can only be submitted and reviewed once your session has begun. If you choose to explore the course without purchasing, you may not be able to access certain assignments.

  • When you enroll in the course, you get access to all of the courses in the Specialization, and you earn a certificate when you complete the work. Your electronic Certificate will be added to your Accomplishments page - from there, you can print your Certificate or add it to your LinkedIn profile. If you only want to read and view the course content, you can audit the course for free.

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