Summary for Week 12

• Lecture 16: We covered X.509 certificates and related topics, such as certificate chain and certificate revocation list (CRL). The three authentication protocols associated with the X.509 standard were also covered.
  Date: Tu, 11/16/2010.
• Lecture 17: We covered network and host intrusion detection systems (IDSs). The lecture can be found here.
  Date: Th, 11/18/2010.