Q4. Briefly describe a task that you perform in your daily life for which authentication of origin and of integrity are essential, but confidentiality is not required. Briefly explain why authentication is needed but confidentiality is not. Q5. Using only your own words (do NOT quote in any way from any source), briefly explain why it is often to difficult to determine where a cybercrime took place for the purpose of establish legal jurisdiction. Q6. Briefly explain why deleting a tweet does not mean the content can no longer be viewed by anyone. and the IP address for