16.2.1. Definition of Public Key Cryptography

Try these first

1. 1.

   What are the two types of keys used in public key cryptography?

   Hint

   Think about who can see the keys.

2. 2.

   Explain the role of the public key.

   Hint

   Everyone can access it.

3. 3.

   What is the key advantage of public key cryptography?

   • It requires secret key exchange
   • It allows anyone to encrypt messages
   • It is less secure than symmetric methods

   Hint

   Consider the role of public keys.

4. 4.

   True or False: In Diffie-Hellman key exchange, both parties must be online at the same time.

   • True
   • False

   Hint

   Recall the communication dynamics.

5. 5.

   Explain how the invention of public key cryptography has transformed secure communications in the digital age.

   Hint

   Think about how this affects email security and online banking.

6. 6.

   Describe an instance where the limitation of Diffie-Hellman can pose a challenge in real-life communication.

   Hint

   Consider scenarios like email exchanges or international meetings.