Security

This section covers cryptography fundamentals and modern security protocols, combining mathematical theory with practical applications in software engineering.

Topics

• Classical Cryptography and Foundations: Historical ciphers (Caesar, Vigenère), hash functions, and symmetric encryption (AES).
• Modern Cryptography and PKI: Asymmetric encryption (RSA, ECC), digital signatures, key exchange protocols (Diffie-Hellman), and TLS/SSL.

Evaluation checklist

For every cryptographic concept, ask:

1. What is the underlying mathematical problem?
2. How does it ensure confidentiality, integrity, authenticity, or non-repudiation?
3. What are its computational costs and security assumptions?
4. How is it applied in real-world systems (e.g., TLS, blockchain, secure communications)?
5. What are known vulnerabilities and attack vectors?