16.6. Conclusion

Try these first

1. 1.

   Define public key cryptography.

   Hint

   Think about the roles of the keys.

2. 2.

   What is the key advantage of the ElGamal scheme?

   Hint

   Consider the method of 'masking' in the process.

3. 3.

   What is the main benefit of public key cryptography?

   • It requires sharing a single key
   • It allows secure key exchange without prior connection
   • It encrypts data

   Hint

   Think about how keys are exchanged.

4. 4.

   The security of ElGamal encryption relies on which of the following problems?

   • Discrete Logarithm Problem
   • Prime Factorization Problem

   Hint

   Which one relates to the key exchange method used?

5. 5.

   Consider a scenario where a public key system is employed in a bank for secure transactions. How might an attacker attempt to exploit weaknesses in such a system?

   Hint

   Think about possible vulnerabilities in cryptographic systems.

6. 6.

   You are tasked with designing a new cryptographic system. Considering what you've learned about ElGamal and RSA, what factors would you prioritize to ensure security?

   Hint

   Reflect on the importance of number choice and algorithm complexity.