2010-2011 Chrismtas Hacking Challenge from www.ethicalhacker.net by "Ed Skoudis & Yori Kvitchko"
- Obtained from http://www.ethicalhacker.net/content/view/344/2/
2011-2012 Chrismtas Hacking Challenge from www.ethicalhacker.net by "Ed Skoudis & Tom Hessman"
- Obtained from http://pen-testing.sans.org/holiday-challenge/2012