Applied Cryptography Labs

Python implementations of classical and modern cryptographic algorithms, built while studying information & cyber security.

What's covered

• ICS-01 - Classical cipher techniques (substitution/transposition)
• ICS-02 - Feistel cipher structure
• ICS-03 - Simplified AES (S-AES)
• ICS-04 - RSA asymmetric encryption
• ICS-05 - MD5 hashing demonstration
• ICS-06 - Diffie-Hellman key exchange
• ICS-07 - Euclidean algorithm (GCD) - used in RSA key generation

How it's organized

Flat structure - one file per exercise, each self-contained and runnable directly (python ICS-0X).

Note

This is foundational cryptography study material, distinct from my applied security/AI security work - see mcp-tool-poisoning-toolkit for current-level work.