Symmetric Cryptography Essential Training

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01 - Introduction

01 - Cryptography is everywhere.mp4

00:41

02 - Basic terminology.mp4

02:11

03 - Intro to Codespaces.mp4

01:46

02 - 1. Symmetric Cryptography Overview

01 - Cryptographys role.mp4

03:26

02 - Kerckhoffss principle.mp4

03:47

03 - Symmetric keys.mp4

03:23

04 - Block vs. stream ciphers.mp4

03:37

05 - Cryptographic hash algorithms.mp4

03:27

06 - Challenge Building a hash algorithm.mp4

02:54

07 - Solution Building a hash algorithm.mp4

02:08

03 - 2. Representing and Manipulating Binary Data

01 - Binary representation.mp4

03:12

02 - Characters.mp4

04:06

03 - Integers.mp4

03:55

04 - Floating point numbers.mp4

03:56

05 - Boolean operations.mp4

03:52

06 - Padding.mp4

03:29

07 - Challenge QR code printer.mp4

02:43

08 - Solution QR code printer.mp4

01:53

04 - 3. Fundamental Algorithms and Components

01 - Simple substitution ciphers.mp4

04:48

02 - Polyalphabetic substitution ciphers.mp4

06:28

03 - Permutation and transposition ciphers.mp4

02:50

04 - Simple one-time pads with XOR.mp4

03:06

05 - S-boxes and P-boxes.mp4

01:49

06 - Feistel networks.mp4

02:30

07 - Linear-feedback shift registers (LFSRs).mp4

02:42

08 - Challenge Software-based LFSR.mp4

01:15

09 - Solution Software-based LFSR.mp4

00:56

05 - 4. Symmetric Algorithms

01 - The Data Encryption Standard (DES).mp4

03:34

02 - The Advanced Encryption Standard (AES).mp4

03:44

03 - AES and DES in practice.mp4

04:49

04 - The RC4 stream cipher.mp4

02:03

05 - Challenge Encrypting, decrypting, and hashing with OpenSSL.mp4

02:17

06 - Solution Encrypting, decrypting, and hashing with OpenSSL.mp4

02:34

06 - 5. Block Cipher Modes

01 - Introduction to block cipher modes.mp4

02:51

02 - Cipher block chaining (CBC).mp4

01:51

03 - CFB Cipher feedback.mp4

01:10

04 - OFB Output feedback.mp4

01:25

05 - CTR Counter mode.mp4

01:03

06 - Challenge Building a block cipher with CBC mode.mp4

02:14

07 - Solution Building a block cipher with CBC mode.mp4

01:03

07 - 6. Keys and a Little Asymmetry

01 - Exchanging keys.mp4

01:34

02 - Key length and large numbers.mp4

04:26

03 - The importance of randomness to cryptography.mp4

02:26

04 - Modular arithmetic.mp4

02:46

05 - DiffieHellman key exchange.mp4

02:29

06 - Challenge Implementing DiffieHellman.mp4

02:05

07 - Solution Implementing DiffieHellman.mp4

01:17

08 - Conclusion

01 - Next steps.mp4

01:25

Description

If you work with computers, you use cryptography. Symmetric cryptography is a common method that uses the same key for encryption and decryption of data. Faster and less resource-intensive than asymmetric cryptography, symmetric cryptography is important for all IT professionals to understand. This course delivers a practical overview of the technology, emphasizing high-level concepts that affect how our data is stored and transmitted. Jeremy Hansen explains the difference between single key (symmetric) and multiple key (asymmetric) algorithms, and shows how symmetric encryption affects underlying binary data. Learn about the basic ciphers used in symmetric cryptography, including substitution, permutation, and transposition, and influential symmetric-key algorithms like the Advanced Encryption Standard and its predecessor, the Data Encryption Standard. Review modern block cipher modes like cipher block chaining (CBC), cipher feedback (CFB), and counter (CTR), which can help secure large amounts of data.

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