Foundations Of Modern Cryptography: Classical Ciphers To Rsa
Published 12/2025
MP4 | Video: h264, 1920x1080 | Audio: AAC, 44.1 KHz, 2 Ch
Language: English | Duration: 49m | Size: 245 MB
Master the art and science of securing information-learn encryption, cryptanalysis, AES, RSA, and digital signatures
What you'll learn
Core principles and goals of cryptography
Classical ciphers: Caesar and substitution techniques
Cryptanalysis basics and attack strategies
Symmetric encryption and its practical strengths
AES algorithm structure and operations
Public-key cryptography fundamentals
RSA key generation, encryption, and decryption
How digital signatures and certificates ensure online trust
Real-world applications of encryption technologies
Requirements
No prior cryptography or cybersecurity experience required
Basic computer literacy
Comfort with simple math (exponents, modular concepts introduced clearly)
Willingness to learn technical concepts step by step
Description
Cryptography is at the heart of modern digital security, protecting everything from online banking and messaging apps to government systems and corporate networks. This course is designed to take absolute beginners and turn them into confident learners who understand how and why encryption secures data. You'll start with classical techniques like the Caesar cipher and substitution systems, move through cryptanalysis methods, and then progress into modern cryptographic algorithms including AES and RSA. Finally, you'll explore digital signatures and certificates-the digital trust system that powers the secure web. Each section builds on the previous one, ensuring clarity, understanding, and a practical appreciation for the science of securing information.Section 1: Foundations of CryptographyOverviewThis section introduces the basic concepts and goals of cryptography: confidentiality, integrity, authentication, and non-repudiation. It also explores how cryptography has evolved from ancient methods to sophisticated modern algorithms.Lecture 1: Cryptography Introduction (Preview Enabled)This lecture explains what cryptography is, why it exists, and the fundamental terms you'll use throughout the course: plaintext, ciphertext, key, encryption, and decryption. It sets the conceptual foundation for everything that follows.Section 2: Classical Cryptography TechniquesOverviewBefore modern computers existed, encryption relied on substitution and shifting techniques. Understanding these early methods helps reveal how cryptography evolved and why more secure systems became necessary.Lecture 2: Caesar Cipher and Substitution TechniquesYou'll explore the Caesar cipher-a simple shift cipher-and other substitution-based techniques. This lecture demonstrates how early cryptography relied on pattern recognition and how attackers exploited predictable structures.Lecture 3: Cryptanalysis and Types of Encryption UsedThis lecture introduces cryptanalysis: the art of breaking ciphers. You'll learn techniques like frequency analysis and brute-force attacks. It also distinguishes between two major encryption types-symmetric and asymmetric-setting the stage for modern systems.Section 3: Symmetric Key CryptographyOverviewThis section focuses on private-key (symmetric) encryption, the fastest and most commonly used method in secure systems today. You'll learn why symmetric algorithms remain essential even in an era of powerful public-key cryptography.Lecture 4: Private Key EncryptionDive into symmetric key concepts, including how private keys are generated, shared, and used. You'll understand the benefits and limitations of symmetric encryption in real-world applications.Lecture 5: AES (Advanced Encryption Standard)This lecture breaks down the world's most widely used encryption algorithm, AES. You'll explore its structure-substitution, permutation, rounds-and learn why AES remains trusted for everything from Wi-Fi networks to military systems.Section 4: Asymmetric CryptographyOverviewAsymmetric (public-key) cryptography changed the world by solving the key distribution problem. This section explains how public-private key pairs work and why they are essential for secure communication.Lecture 6: Public and Private KeysYou'll learn the principles of asymmetric key generation and how public/private key pairs are used for encryption, decryption, and authentication.Section 5: RSA - The Backbone of Internet SecurityOverviewRSA is one of the most widely recognized public-key algorithms. This section thoroughly explains how RSA works-from generating keys to encrypting and decrypting data.Lecture 7: How RSA Public and Private Keys Are FormedExplore RSA key generation using prime numbers, modular arithmetic, Euler's theorem, and the importance of computational difficulty.Lecture 8: RSA Continued - Operations & The Real WorldThis lecture covers RSA encryption/decryption, signatures, performance characteristics, and practical use cases such as SSL/TLS and secure email.Section 6: Digital Trust and IdentityOverviewEncryption alone is not enough-identities must also be verified. This final section introduces digital signatures and certificates, which enable secure authentication on the internet.Lecture 9: Digital Signatures and Digital CertificatesYou'll learn how digital signatures ensure integrity and authentication, and how certificates (issued by Certificate Authorities) allow users to trust websites, software, and communication channels.Conclusion:By completing this course, you've gained a deep understanding of both classical and modern cryptographic systems. You now understand how data is secured, how keys are generated and used, and how digital trust is established online. Cryptography is foundational to cybersecurity, and with this knowledge, you're ready to explore advanced areas like network security, ethical hacking, blockchain cryptography, or cryptographic engineering.
Who this course is for
Cybersecurity beginners
Computer science and IT students
Ethical hacking and penetration testing aspirants
Developers seeking to understand secure communication
Anyone curious about how data stays safe in the digital world
Non-technical professionals who want a solid foundation in encryption
Foundations Of Modern Cryptography: Classical Ciphers To Rsa
