AES-GCM Encrypt & Decrypt in Python
Implement authenticated encryption with proper nonce management.
Why AES-GCM?
AES-GCM is an Authenticated Encryption with Associated Data (AEAD) scheme. It provides confidentiality (AES-CTR) and integrity/authenticity (GHASH MAC) in a single pass — the standard for modern encryption.
GCM Components: CTR + GHASH
AES-GCM = AES in Counter mode (encryption) + GHASH polynomial MAC (authentication). The 128-bit authentication tag covers both ciphertext and optional Additional Authenticated Data (AAD).
All lessons in this course
- Python cryptography Library Overview
- AES-GCM Encrypt & Decrypt in Python
- RSA & ECDSA Key Pairs in Python
- Common Python Crypto Pitfalls & Secure Patterns