Ch 3 · Encryption · Theory

Topic 3 of 10 in Networks & Data Transmission — How Machines Talk — 2 lessons.

Scrambling for Safety

Error detection keeps data *correct*; encryption keeps it *private*. It scrambles readable plaintext into unreadable ciphertext using a key. Only someone with the right key can turn it back.

Symmetric vs Asymmetric

All topics in Theory Networks-transmission

1. Sending Bits Down a Wire
2. Error Detection
3. Encryption
4. Networks & the Internet
5. Protocols
6. Packet Switching
7. Topologies & Addressing
8. The Web, Cyber-security & Digital Currency
9. Cloud Computing
10. Check Your Understanding