Defcon is the one of the oldest and largest continually running hacker conventions, started by The Dark Tangent. It is built around people who love to explore, share knowledge, and learn about security and computing. It continues the tradition of the old computer and hacker conferences, such as the old Trenton Computer Festival (TCF), which have since either stopped operating or drastically changed. This is the closest you will get to the original conferences that we or our parents/relatives attended at the dawn of computing.”]
Source: https://www.csoonline.com/article/3432158/thoughts-from-defcon-27.html