7. Encryption

1. What is encryption and decryption?
2. What is symmetric and asymmetric cryptography?
3. What is the Caesar Cipher?
4. What is Atbash?
5. What is Multi-Alphabet Substitution?
6. What is Rail Fence?
7. What is Enigma?
8. What is block cipher and stream cipher?
9. What is Data Encryption Standard?
10. What is Advanced Encryption Standard?
11. What is Blowfish?
12. What is Public Key Encryption?
13. What is RSA?
14. What is Pretty Good Privacy?
15. What is a Digital Signature?
16. What is Hashing?
17. What is SHA?
18. What is MAC and HMAC?
19. What is Rainbow Tables?
20. What is Steganography?
21. What is Frequency Analysis?