Cryptography & Network Security

4. (10 points) Web and System Security (a) (2 points) What are the ethical responsibilities of computer engineers when working with private customer data? (b) (2 points) Explain how an XSS attack works and how it can be prevented. (c) (2 points) Explain how SQL injection works and how it can be prevented. (d) (4 points) State the four types of firewalls and explain briefly how they work