Q1: What are the key principles of security? Q2: What are the types of malicious software? Briefly explain each of them. Q3: What is network security? Q4: What is an intruder? Describe the function & benefits of Intrusion detection. Q5: what is the difference between traditional cryptography and modern cryptography? Explain with example. Q6: Differentiate between cryptanalysis and cryptography. Q7: What is steganography? What are various drawback and advantages of steganography. Q8: Explain DES algorithm. Q9: What is Phishing? Explain DNS based phishing. Q10: Write short notes on Firewall and their design principles. Q11: What are the different classes of hackers? Discuss them in details