Encryption Types

1. Symmetric Encryption (AES)

How AES uses one shared key for fast encryption—and how keys must stay secret.

2. Asymmetric Encryption (RSA)

Public/private key pairs: encrypt with one key, decrypt with the other.

3. Public Key Infrastructure (PKI)

Certificates, trust chains, and how PKI connects identities to public keys.

4. Digital Signatures

Prove who signed a message and that it was not altered in transit.

5. Quiz — Encryption

10-question quiz on AES, RSA, PKI, and digital signatures.