EPISODES:
Cryptography with Python 1: Introduction and content of course Cryptography with Python 2: Cryptography & its classic security goals Cryptography with Python 3: Confidentiality as a security goal Cryptography with Python 4: Symmetric encryption with AES and ECB/CBC Cryptography with Python 5: Using insecure AES-ECB in Python Cryptography with Python 6: Using secure AES-CBC in Python Cryptography with Python 7: Implementing AES in Python #1 Cryptography with Python 8: Implementing AES in Python #2 Cryptography with Python 9: Implementing AES in Python #3 Cryptography with Python 10: Implementing AES in Python #4 Cryptography with Python 11: Implementing AES in Python #5 Cryptography with Python 12: Implementing AES-ECB/CBC in Python #1 Cryptography with Python 13: Implementing AES-ECB/CBC in Python #2 Cryptography with Python 14: Asymmetric encryption with RSA Cryptography with Python 15: Using RSA in Python Cryptography with Python 16: Implementing RSA in Python #1 Cryptography with Python 17: Implementing RSA in Python #2 Cryptography with Python 18: Implementing RSA in Python #3 Cryptography with Python 20: Implementing hybrid RSA-AES encryption in Python Cryptography with Python 21: Using EDH and ECDHE in Python Cryptography with Python 22: Implementing a P-256 ECDHE in Python Cryptography with Python 23: Integrity as a security goal Cryptography with Python 24: Hash function structure and properties Cryptography with Python 25: Hash function security Cryptography with Python 27: Implementing SHA-256 in Python #1 Cryptography with Python 28: Implementing SHA-256 in Python #2 Cryptography with Python 30: HMAC, Encrypt-then-MAC and GCM Cryptography with Python 26: Using MD5, SHA-1, SHA-2, SHA-3 in Python Cryptography with Python 31: Using HMAC in Python Cryptography with Python 34: Using AES-GCM in Python Cryptography with Python 35: Implementing AES-GCM in Python #1 Cryptography with Python 36: Implementing AES-GCM in Python #2 Cryptography with Python 37: Non-repudiation as a security goal Cryptography with Python 38: Digital signatures Cryptography with Python 39: Using RSA-PSS & Ed25519 signatures in Python Cryptography with Python 40: Recap and summary

Cryptography with Python 36: Implementing AES-GCM in Python #2

Entire course: ➡️ https://www.youtube.com/playlist?list=PLWjMI9CAmVU4–SmpzgswTvxLkZqC9QWn

⏰ Timestamps for content in this video ⏰

00:00 Introducing the GCM GHASH hash calculation function
00:57 Introducing the GCM GCTR counter-mode based encryption function
01:57 Implementing GHASH in Python
04:06 Implementing the GCM MUL 128-bit block multiplication function in Python
07:21 Implementing GCTR in Python
11:15 Executing the AES-GCM implementation

🔷🔷 About 🔷🔷

This Fundamental Cryptography in Theory and Python lesson is the 2nd of 2 parts demonstrating, how AES-GCM can be implemented in Python straight out of the official standardization document NIST SP 800-38D which defines the Galois/Counter Mode (GCM) block cipher mode of operation.

In this second part, the implementation of the GHASH function and the GCTR function are demonstrated, which concludes the implementation of AES-GCM.

All code demonstrated serves educational purposes only.

📝 Resources used and created for code lessons 📝

https://github.com/cgossi/fundamental_cryptography_with_python

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