6. Who developed Data Encryption Standard * (DES)? Your answer 7. What year Advanced Encryption Standard * (AES) was published? 8. Why AES uses 128 bit keys and not 10,000 bit keys? Your answer 9. What is the solution for a server to send a secret key over the public internet to user wishing to connect securely? 10. What Caesar Cipher, Enigma and AES has in common?.