For web applications: https://www.hackthissite.org https://www.hackthissite.org http://www.enigmagroup.org/ http://www.enigmagroup.org/ For offensive compute

For web applications: https://www.hackthissite.org https://www.hackthissite.org http://www.enigmagroup.org/ http://www.enigmagroup.org/ For offensive computer security: http://www.cs.fsu.edu/~redwood/OffensiveComputerSecurity/lectures.html http://www.cs.fsu.edu/~redwood/OffensiveComputerSecurity/lec...