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Everyday Cryptography

Everyday Cryptography

Delve into cryptographic principles, explore key encryption methods, authentication, and data integrity techniques, and learn about real-world applications and government policies surrounding information security.

Beginner

181 Lessons

30h

Certificate of Completion

Delve into cryptographic principles, explore key encryption methods, authentication, and data integrity techniques, and learn about real-world applications and government policies surrounding information security.

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Explanations

AI-POWERED

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This course includes

57 Playgrounds
16 Quizzes

This course includes

57 Playgrounds
16 Quizzes
Course Overview
What You'll Learn
Course Content

Course Overview

In recent years, the world has witnessed an exponential increase in data. As applications—such as those belonging to financial institutions and governments—become more widespread and the traffic over insecure networks increases, it becomes increasingly important to understand information security principles and techniques. With this goal in mind, “Everyday Cryptography” introduces learners to different aspects of cryptography. The course begins by explaining the key pillars of information security. It intr...Show More

What You'll Learn

An understanding of the fundamental principles of information security

A working knowledge of symmetric (or private key) encryption

A working knowledge of asymmetric (or public key) encryption

Familiarity with techniques for data integrity and authentication

An understanding of key management techniques

Ability to assess the strengths and weaknesses of cryptographic protocols

Introduction to cryptography for personal devices and day-to-day activities

An understanding of potential issues when cryptography and government policy come face to face

What You'll Learn

An understanding of the fundamental principles of information security

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Course Content

1.

Introduction

Get familiar with cryptography's core principles, practical applications, and societal implications.
About This Course
Course Structure
2.

Basic Principles

Grasp the fundamentals of information security, cryptography principles, and securing digital communications.
Why Information Security?
Perspectives and Security Infrastructure
Security Risks
Security Services
Relationships between Security Services
Fundamentals of Cryptosystems
Basic Model of a Cryptosystem
Components of Cryptography
Cryptosystem Security Assumptions
Advantages and Usage of Publicly Known Encryption Algorithms
Breaking Cryptosystems
Cryptosystems and Encryption Algorithms
Exhaustive Key Searches
Classes of Attack
Recap of Basic Principles
3.

Historical Cryptosystems

Examine historical cryptosystems' evolution, keyspace importance, and mitigation techniques for frequency analysis.
Ceasar Cipher
Simple Substitution Cipher
Frequency Analysis
Frequency Analysis—Theory vs Practice
Playfair Cipher
Homophonic Encoding
Vigenère Cipher
Recap of Historical Cryptography
4.

Theoretical versus Practical Security

Grasp the fundamentals of theoretical versus practical cryptographic security, including perfect secrecy and key management challenges.
Theoretical Security
One-Time Pads
One-Time Pad Examples
Vernam Cipher
Practical Security
Computational Complexity
Design Process of a Cryptosystem
Evaluating Security
Recap of Theoretical versus Practical Security
5.

Symmetric Encryption

Dig into types, properties, and applications of symmetric encryption algorithms.
Classification of Symmetric Encryption Algorithms
Stream Ciphers
Block Ciphers
The Data Encryption Standard
Exploring the History of DES
Triple DES
The Advanced Encryption Standard
Modes of Operation: ECB Mode
Modes of Operation: CBC Mode
Modes of Operation: CFB Mode
Modes of Operation: CTR Mode
Comparing Modes of Operation
Use of Symmetric Encryption
Recap of Symmetric Encryption
6.

Public-Key Encryption

14 Lessons

Follow the process of understanding public-key encryption, RSA, ElGamal, ECC, and their applications.
7.

Data Integrity

11 Lessons

Master the steps to ensure data integrity using hash functions, MACs, and authenticated encryption.
8.

Digital Signature Schemes

9 Lessons

Sharpen your skills in utilizing digital signatures for secure authentication and non-repudiation.
9.

Entity Authentication

8 Lessons

Solve challenges with entity authentication for secure and fresh communication.
10.

Cryptographic Protocols

16 Lessons

Work your way through the design, analysis, and implementation of cryptographic protocols.
11.

Key Management

15 Lessons

Grasp the fundamentals of securing and managing cryptographic keys through various methods and principles.
12.

Public-Key Management

10 Lessons

Take a closer look at managing public keys, focusing on certificates and alternative approaches.
13.

Cryptographic Applications

31 Lessons

See how cryptography secures internet, wireless networks, payments, telecommunications, anonymity, and digital currencies.
14.

Cryptography for Personal Devices

5 Lessons

Enhance security on personal devices with cryptographic methods for file protection, email, messaging, and platforms.
15.

Control of Cryptography

6 Lessons

Learn how to use strategies to balance cryptography security and accessibility, addressing ethical dilemmas.
16.

Mathematics Appendix

6 Lessons

Get started with essential mathematical principles for cryptographic systems, including decimals, binary, hex, ASCII, modular arithmetic, RSA, and ElGamal.
17.

Closing Remarks

2 Lessons

Examine the importance of cryptography and acknowledge the foundational knowledge acquired.

Course Author

Trusted by 1.4 million developers working at companies

Anthony Walker

@_webarchitect_

Evan Dunbar

ML Engineer

Carlos Matias La Borde

Software Developer

Souvik Kundu

Front-end Developer

Vinay Krishnaiah

Software Developer

Eric Downs

Musician/Entrepeneur

Kenan Eyvazov

DevOps Engineer

Souvik Kundu

Front-end Developer

Eric Downs

Musician/Entrepeneur

Anthony Walker

@_webarchitect_

Evan Dunbar

ML Engineer

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