Crypto in Practice

1. Common Crypto Mistakes

Avoid homebrew crypto, reused nonces, and rolling your own protocols.

2. Key Management Basics

Generate, store, rotate, and revoke keys without leaving secrets in chat or git.

3. Lab — Encrypt & Verify a File

Hash and encrypt a sample file with OpenSSL, then verify integrity.

4. Quiz — Cryptography Basics Final

Final 10-question quiz across hashing, encryption, TLS, and crypto hygiene.