Cryptography for Beginners - Full Python Course (SHA-256, AES, RSA, Passwords)

Web Reference: Cryptography, or cryptology, [1] is the practice and study of techniques for secure communication in the presence of adversarial behavior. [2] More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages. [3] Cryptography is the practice of developing and using coded algorithms to protect and obscure transmitted information so that it may only be read by those with the permission and ability to decrypt it. Dec 12, 2025 · Cryptography is the science of protecting information using mathematical techniques to ensure confidentiality, integrity, and authentication. It transforms readable data into unreadable form, preventing unauthorized access and tampering.

YouTube Excerpt: Learn about cryptography in this beginner's course. You'll learn essential techniques like hashing (SHA-256) for verifying file integrity, symmetric encryption (AES), and asymmetric encryption (RSA) using public and private keys. The practical focus of the tutorial involves building a fully functional command-line cryptography tool in Python. Upon completion, you'll have a complete practical toolkit and the skills to safeguard data, secure passwords, and deter tampering. This course was developed by Thanishkka. She is part of Hack Club. Hack Club is a global non-profit organization that creates a community for high school students interested in coding and making things with technology. Hack Club is free and any teenager can join. Check out their site to get stickers and learn more: https://hackclub.com/ ⭐️ Contents ⭐️ - 00:00 Introduction: What is Cryptography? - 00:36 About Hack Club and the Course Creator - 01:09 Cryptography Basics & Cybershe Demo - 02:26 Three Main Areas: Hashing, Symmetric, and Asymmetric Encryption - 03:09 Deep Dive into Hashing (SHA 256) and File Integrity - 04:37 Symmetric Encryption with AES (Key, IV, and Modes) - 07:20 Asymmetric Encryption with RSA (Public and Private Keys) - 09:37 Setup: Python and VS Code Installation - 10:40 Creating and Activating a Virtual Environment - 12:15 Installing Required Python Libraries (cryptography, zxcvbn, bcrypt) - 13:46 Coding the File Hashing Function (hash.py) - 18:36 Coding the File Integrity Verification Function - 22:05 Coding AES Symmetric Encryption/Decryption (encryption.py) - 26:26 Coding RSA Asymmetric Encryption/Decryption - 30:03 Coding the Password Strength Checker (password.py) - 35:28 Coding Password Hashing and Verification (using bcrypt) - 39:27 Building the Command Line UI (main.py) - 47:26 Final Toolkit Demo and Testing - 49:15 Conclusion and Next Steps ❤️ Support for this channel comes from our friends at Scrimba – the coding platform that's reinvented interactive learning: https://scrimba.com/freecodecamp 🎉 Thanks to our Champion and Sponsor supporters: 👾 Drake Milly 👾 Ulises Moralez 👾 Goddard Tan 👾 David MG 👾 Matthew Springman 👾 Claudio 👾 Oscar R. 👾 jedi-or-sith 👾 Nattira Maneerat 👾 Justin Hual -- Learn to code for free and get a developer job: https://www.freecodecamp.org Read hundreds of articles on programming: https://freecodecamp.org/news

Learn about cryptography in this beginner's course. You'll learn essential techniques like hashing (SHA-256) for verifying file integrity,...

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