Question 1: PGP
On one of the Linux machines (don't use the Suns [orcus or yeenoghu]) read the manual pages for PGP. Create a public and private key set for yourself and encrypt the answers to this quiz to Anna Lee (annalee@cs.uchicago.edu). Her key will be available by 'finger'. Put your public key in your 'finger' information by adding it to the file '.plan' in your home directory.

Question 2: Kerberos
Why is it that in order to provide securely authenticated file service, you cannot let people log into the machines that provide the file service (under kerberos)? Discuss (briefly [ie <= 3 sentences]) why the alternatives fail.

Question 3: The COAST project
Read their documentation on tripwire here. Write a configuration file and create a database that can be used to monitor the /etc directory on several linux machines. The reports should only tell you when files have been modified. Remove the files (from the database) that should be different on two different hosts.