16.6.1. Summary of Lecture

Try these first

1. 1.

   What is public key cryptography?

   Hint

   Think about how messages can be encrypted without sharing keys.

2. 2.

   Name one limitation of the Diffie-Hellman key exchange.

   Hint

   Consider situations where parties may not be available at once.

3. 3.

   What does public key cryptography use to encrypt messages?

   • A single secret key
   • A public and a secret key
   • Only a public key

   Hint

   Think about the roles of both types of keys in this system.

4. 4.

   True or False: The Diffie-Hellman protocol allows communication without the need for both parties to be online.

   • True
   • False

   Hint

   Consider the limitations of this protocol.

5. 5.

   Design a simple public key cryptosystem, specifying how keys will be shared and messages encrypted.

   Hint

   Use examples to illustrate your process.

6. 6.

   Analyze the weaknesses of public key cryptosystems and discuss potential solutions to mitigate these vulnerabilities.

   Hint

   Think about real-life implications of security breaches.