List of general computer security conferences
General security conferences might be held by non-profit/not-for-profit/for-profit professional associations, individuals or informal group of individuals, or by security product vendor companies.
Application Security USA (OWASP) - Focuses on web application security,
SIN ACM or the International Conference on Security of Information and Networks, 
ACM-CCS (Conferences on Computer and Communications Security), security conference held since 1993.
ACSAC, Annual Computer Security Applications Conference - oldest information security conference held annually
ASIA or the Annual Symposium on Information Assurance that serves as the academic track for the New York State Cyber Security Conference, an annual information security conference held in Albany, NY usually for two days during June targeted at academic, government, and industry participants.
DeepSec, in Vienna, Austria covers many security aspects of computing and electronic communications as well as security management and social aspects. DeepSec is visited by a broad international audience, academics, researchers, vendors, finance, public administration etc. (2 days trainings, 2 days conference). Presentations are published on Vimeo and YouTube.
HITBSecConf / Hack In The Box, deep-knowledge security conference held in Malaysia and The Netherlands
FSec - Croatian annual security conference held at the Faculty of organization and informatics in Varaždin, Croatia.
Hacker Halted, Presented by EC-Council, the objective of the global series of Hacker Halted conferences is to raise international awareness towards increased education and ethics in IT Security.
Hackito Ergo Sum, Security conference pertaining to research topics, with attendees and speakers from both the industry, the offensive side and the academic circles, held in Paris every April.
ICMC, a conference focused on cryptographic modules, FIPS 140-2, ISO/IEC 19790 and cryptographic algorithms.
IEEE Symposium on Security and Privacy, top-tier privacy & security conference.
, Beyond Information Warfare - Offensive Cyber Weapons and Technologies Training Congress
NDSS (Network & Distributed System Security Symposium), annual security conference from Internet Society.
NSPW (New Security Paradigms Workshop), a workshop with new ideas in security.
RSA Security Conference, Cryptography and information security-related conference held annually in the San Francisco Bay Area.
S4:SCADA Security Scientific Symposium, Security conference pertaining to SCADA held annually by Digital Bond, usually in Miami, FL.
SecureWorld Expo, A series of IT Security conferences offering education, CPE training opportunities, and networking of security leaders, experts, senior executives, and policy makers who shape the face of security.
SSTIC Annual French Security Symposium held in Rennes, France.
SOURCE Conference, SOURCE is a computer security conference in Boston, Seattle, and Barcelona that offers education in both the business and technical aspects of the security industry.
TROOPERS IT Security Conference, Annual international IT Security event with workshops held in Heidelberg, Germany.
USENIX Security, annual security conference associated with USENIX.
The actual events, timespans, and details of various themes of these conventions not only depends on the specific convention attended but also its perceived reputation. Typically the actual details of any given convention are couched in mild secrecy due to the legality of certain panels, as well as the willingness of attendees to explain themselves to law enforcement and less computer-savvy individuals (see hacker definition controversy).
Common topics include wardriving, lockpicking, corporate and network security, personal rights and freedoms, new technologies, as well as general 'geek' motifs. Some may also have contests and general collaborative events such as hackathons.
List of hacker conferences
AthCon, the largest hacker conference in South Eastern Europe taking place annually in Athens, Greece.
B Sides, community conference that initially started in the US is now global.
SkyDogCon, A technology conference in Nashville, TN for the individual with the Renaissance Mind. SkyDogCon exists to facilitate learning, information sharing, and mingling with like-minded people in a relaxed atmosphere.
Summercon, one of the oldest hacker conventions, held during Summer (frequently in June). It helped set a precedent for more modern "cons" such as H.O.P.E. and DEF CON.
T2 infosec conference, focuses on newly emerging information security research with a balance of topics on auditing and pen-testing, and security and defensive strategies. In general, presentations will address different aspects of information security—all presentations will include demos and be technically oriented and practical.
ToorCon, San Diego hacker convention that emerged from the 2600 user group frequently in late September.
Non-annual hacker conventions
Stichting HAL2001, a not-for-profit organization, holds a quadrennial Dutch hacker convention. They have, so far, held HAL2001 (Hackers at Large) and What the Hack (2005, originally called HEX (referring to the 16th anniversary of the event, as well as an acronym for Hacking Extreme)). The Dutch conferences held prior Stichting HAL2001's existence were Galactic Hacker Party (1989), Hacking at the End of the Universe (1993) and Hacking In Progress (1997), notable for being held simultaneously and in conjunction with Beyond HOPE. The not-for-profit organization 'Stichting Hxx' was organizing the 2009 incarnation of this con; HAR (Hacking at Random). During the summer of 2013 the most recent installment of the series, called OHM (Observe Hack Make)), was held.