2600 - 2600 Magazine's Monthly Meetings (Meeting, First Friday)
BlackHat - Black Hat Briefings (Conference, late-July)
CanSecWest - This conference focuses on newly emerging information security research, with a balance of both topics on auditing and pen-testing as well as security and defensive strategies. (Conference, early-May)
DefCon - The largest underground hacking event in the world. (Conference, early-August)
DefCon Groups - Local DefCon Group Monthly Meetings (Meeting, Varies)
HOPE - Hackers On Planet Earth (Conference)
IT Underground - An international conference dedicated to IT security issues, where remarkable authorities share their knowledge and experience with IT specialists. (Conference)
PacSec - The PacSec meeting provides an opportunity for foreign specialists to be exposed to Japanese innovation and markets and collaborate on practical solutions to computer security issues. (Conference)
PakCon - Underground hacking convention (Conference)
ReCon - A computer security conference being held in Montreal. The conference offers a single track of presentations over the span of three days. (Conference)
RUXCON - A conference organised by and for the Australian computer security community. It is an attempt to bring together the individual talents of the Australian scene, through live presentations, activities, and demonstrations. (Conference)
ShmooCon - Shmoo Group's Security Conference (Conference)
SummerCon - The oldest of the hacker cons. It is a social event with presentations to help get the conversations started. (Conference)
ToorCon - Information Security Conference (Conference)
What The Hack! - What The Hack is an outdoor hacker conference/event taking place on a large event-campground in the south of The Netherlands (Conference)
XCon - Information Security Conference organized by the XFocus Security Team (Conference, mid-August)