Symmetric Ciphers Practice
Questions randomly practice Caesar cipher (shift) or Vernam cipher (one-time pad with XOR).
Asymmetric Encryption Simulation
Public Key — shared freely
Private Key — kept secret
Alice
PubA ✓
PrivA 🔒
Bob
PubB ✓
PrivB 🔒
📨 Encrypted
Digital Signatures Simulation
Public Key — shared freely
Private Key — kept secret
Alice (Sender)
PubA ✓
PrivA 🔒
Bob (Receiver)
PubA ✓
📜 Message + ✍️ Signature
Digital Certificates Simulation
Public Key — shared freely
Private Key — kept secret
Certificate Authority
PrivCA 🔒 PubCA ✓
Alice (Server)
PubA ✓
PrivA 🔒
Bob (Browser)
PubCA pre-installed ✓
📜 Certificate
Multiple Choice — Encryption Concepts
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Correct
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Wrong
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