Cryptography Mastery:Learn Encryption & Secure Communication

Name: Cryptography Mastery:Learn Encryption & Secure Communication
Rating: 4.4 (21 reviews)

Practical Hands-on with Python Programming

Created byMohuya Chakraborty

Last updated 3/2025

English

English [Auto],

What you'll learn

Concept of Network Security, Services and Mechanisms
Malware
Symmetric Key Cryptographic techniques
Asymmetric Key Cryptographic Techniques
Hands on with Python Programming for several cryptographic algorithms

Course content

4 sections • 52 lectures • 6h 23m total length

About the Section on Introduction to Network Security1:31
This video gives an overview of Section 1
1.1 Introduction9:48
This video gives an understanding about the need for network security and related aspects.
1.2 Network Attacks9:21
This video explains various types of network attacks.
1.3 Network Security Services12:44
This video explains the various categories of security services.
1.4 Malware Types Part 17:54
This video explains definition, usage and few types of malware attacks.
1.5 Malware Types Part 26:54
This video explains other types of malware attacks.
1.6 Malware Spread6:54
This video explains the methods spread of malware in various computer systems.
1.7 Malware Protection5:56
This video explains the protection mechanisms against malware attacks.
1.1 Hands-on Malware Analysis21:50
Analyze malware traffic with Wireshark to identify indicators of compromise such as IP addresses, domain names, host names, MAC addresses, and file hashes, and verify findings on VirusTotal.
Network Security

Overview of Section 21:49
This video gives an overview of Section 2
2.1 Classical Cryptosystem12:06
This video gives a short description of a Single Round Function used for DES algorithm.
2.1 Hands-on with Python-Caesar Cipher, Reverse Cipher, Caesar Hacker, ROT1312:05
Engage in hands-on practice with Python Caesar cipher, reverse cipher, ROT13, and Caesar hacker techniques to explore encryption and secure communication.
2.2 Playfair Cipher10:22
Explore the Playfair cipher, a manual symmetric encryption that encodes letter pairs (bigrams) using a keyword-based five-by-five matrix, merging i and j and inserting a filler for doubles.
2.2 Hands-on with Python-Playfair Cipher4:33
Explore practical encryption with Python by implementing the Playfair cipher and analyzing its role in secure communication.
2.3 Single Round Function3:31
2.4 Data Encryption Standard (DES)14:21
This video teaches DES algorithm.
2.3 Hands-on with Python-DES7:29
Practice implementing Python-DES to encrypt data and explore hands-on techniques for secure communication in cryptography through real-world exercises.
2.5 Substitution Cipher-Hill Cipher7:13
2.4 Hands-on with Python-Hill Cipher4:56
2.6 Substitution Cipher-Vigenere Cipher7:37
Explore polyalphabetic substitution with the Vigenere cipher, using a repeating keyword and the Vigenere table to perform encryption and decryption and thwart monoalphabetic attacks.
2.5 Hands-on with Python-Vigenere Cipher2:43
2.7 Transposition Cipher-Rail Fence7:49
Learn the rail fence transposition cipher by writing plaintext in diagonal rows and reading off rows to form ciphertext; practice two- and three-row variants and master encryption and decryption techniques.
2.8 Transposition Cipher-Advanced Rail Fence5:46
Master advanced rail fence transposition by writing plaintext in a rectangle row by row and reading columns in a keyword-based permutation. Apply two-stage encryption to further strengthen security.
2.6 Hands-on with Python-Rail Fence2:16
Cryptography Part 1

Overview of Section 31:56
This video gives an overview of Section 3
3.1 IDEA8:34
3.2 RC56:51
Explore the Rivest cipher RC5, a flexible symmetric key block cipher with variable key size, data size, and rounds, including its encryption, decryption, subkey generation, and two word blocks.
3.3 MAC10:13
3.4 Hash Basics10:31
This video gives basics of Hash algorithm and its properties.
3.5 Hash Design5:31
This video gives the description of design principles of Hash algorithm.
3.6 Hash Applications8:44
This video highlights the applications of Hash algorithm.
3.2 Hands-on with Python-SHA4:54
3.7 MD5 Steps7:41
3.8 MD5 Architecture9:32
Explore the MD5 architecture for processing 512-bit blocks, including padding, the 128-bit digest from the a, b, c, d buffers, and the four rounds with f, g, h, i.
3.9 MD5 Implementation Steps7:11
Delve into MD5 implementation steps, including 448-mod padding, 64-bit plaintext, initialization of 32-bit a b c d buffers, and the four-round, 64-operation compression producing a 128-bit digest.
3.3 Hands-on with Python-MD52:45
3.10 Public Key Cryptosystem - RSA13:09
Explore how public key cryptosystems use a public key for encryption and a private key for decryption, focusing on RSA, its key pair generation, and practical examples.
3.4 Hands-on with Python - RSA5:17
3.11 Diffie Hellman6:06
Diffie-Hellman key exchange derives a shared secret without exchanging keys, using q and alpha, private x_a, x_b, and public y_a, y_b.
3.12 Primitive Roots2:01
Explore primitive roots of prime numbers, the discrete logarithm problem, and how the Diffie-Hellman key exchange leverages these concepts to secure communications.
3.5 Hands-on Diffie Hellman3:45
Explore hands-on Diffie-Hellman to understand secure key exchange and encryption foundations and principles in modern cryptography.
Cryptography Part 2

Overview of Section 41:16
This video gives an overview of Section 4
4.1 AES12:04
Learn the advanced encryption standard (AES), a NIST block cipher with 128/192/256-bit keys, 10/12/14 rounds, and a substitution-permutation network including sub bytes, shift rows, mix columns, and add round key.
4.1 Hands-on with Python-AES4:44
4.2 RC46:45
Explore RC4, a Rivest cipher 4 stream cipher with 64- or 128-bit keys, key scheduling and PRGA keystream generation, encrypted via XOR, with variants and ssl/tls and WiFi applications.
4.2 Hands-on with Python-RC43:37
Practice hands-on cryptography with Python RC4 to learn encryption concepts. Explore secure communication principles through a practical coding exercise.
4.3 Blowfish Algorithm10:21
Learn the Blowfish symmetric key block cipher: 64-bit blocks, variable 32–448 bit keys, and a 16-round feistel network with large key-dependent s-boxes and an output whitening step.
4.4 Quantum Cryptography11:20
Explore how quantum cryptography uses quantum physics to enable unconditionally secure quantum key distribution and detect eavesdropping, highlighting photons, polarization, and the Alice and Bob key exchange.
4.5 One Time Password (OTP)5:38
Understand how one time passwords provide a secure, single-use authentication layer via multi-factor authentication, with fresh credentials that expire and cannot be reused.
4.6 Birthday Attack6:30
4.7 DNA Cryptography8:49
Explore dna-based cryptography that encodes plaintext into dna bases, compares stream and block ciphers, and demonstrates one-time pad and xor schemes for secure storage and retrieval.
4.8 Image Steganography in Cryptography9:57
Learn how image steganography hides data in a cover image and create a stego image, then compare it to cryptography. Explore methods like least significant bit insertion and encryption steps.
Advanced Topics

Requirements

Basic knowledge of computer networks
Programming experience of Python
Basic knowledge of mathematics

Description

This a detailed course on Cryptography, which is a way to secure important information and communication through codes. These codes are only available to the rightful owner and hence it can be used to combat attacks, and protect your data from hackers. Every organization, regardless of size, industry or infrastructure, requires a degree of network security solutions in place to protect it from the ever-growing landscape of cyber threats in the wild today. Network security is a comprehensive aspect that shelters a multitude of technologies, devices and processes involved in computer networks. With the advent of Internet and world wide web our interconnected computers are prone to threats and attacks through the system vulnerabilities and this in turn can hamper the activities of an organization or even an individual. In its simplest term, network security comprises a set of rules and configurations designed to protect the confidentiality, integrity and availability of computer networks and data using both software and hardware technologies.

There are several reasons to learn network security and cryptography.

In our everyday lives, cryptography is used extensively and is ubiquitous. Say for example, we may use it to securely shoot passwords over massive networks for online shopping. It is used in financial transaction in banks where Bank servers and e-mail clients save your passwords using cryptography. Cryptography is used to secure all transmitted information in our IoT-connected world, to authenticate people and devices, and devices to other devices.

In this course I will take you through a tour of various cryptographic techniques.

There are basically 2 types of cryptographic systems. Symmetric key cryptosystem and asymmetric key cryptosystem. In symmetric key cryptosystem there is a single key used for encryption as well as decryption. In asymmetric key cryptosystem, there is a pair of keys- one used for encryption and the other for decryption. Encryption is the process of converting the plaintext or original message to ciphertext or coded message whereas decryption converts the ciphertext back to plaintext. So, encryption is used at the sender side whereas decryption is used at the receiver side. Towards the end of the course some complex research related cryptographic topics have been discussed that will be beneficial to the researchers and advanced learners.

Who this course is for:

Anybody interested in the area of network security and cryptography, especially students of undergraduate and postgraduate courses of computer science as well as research scholars

Cryptography Mastery:Learn Encryption & Secure Communication

What you'll learn

Explore related topics

Course content

Introduction to Network Security9 lectures • 1hr 23min

Cryptography Part 115 lectures • 1hr 45min

Cryptography Part 217 lectures • 1hr 55min

Advanced Research Topics on Cryptography11 lectures • 1hr 21min

Requirements

Description

Who this course is for: