Taught 20412D Day 3 . David PapkinJuly 16, 2014 David Papkin Category No Comments Taught 20412D Day 3 .Sites and Certificates. Disussed ISTG david mark papkin, David Papkin, mct ← 20412D Day 1 CEH day 1 → Leave a Reply Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment. This site uses Akismet to reduce spam. Learn how your comment data is processed.