DEF CON is an annual hacker convention held in Las Vegas, Nevada. It’s one of the largest and most well-known events in the cybersecurity world, attracting over 30,000 attendees, including computer security professionals, journalists, lawyers, government employees, security researchers, students, and hackers.

DEF CON is one of the world’s largest and longest-running hacking conferences, held annually in Las Vegas, Nevada. It brings together hackers, cybersecurity professionals, researchers, and government officials to discuss security vulnerabilities, emerging threats, and cutting-edge technology.

DEF CON 33 (2025) Details

• Dates: August 7-10, 2025
• Location: Las Vegas Convention Center, South Hall
• Theme: “Access Everywhere” – focusing on open access to information and security
• Events & Villages:

• Capture the Flag (CTF) – One of the most prestigious hacking competitions.
• Lockpicking Village – Hands-on experience with physical security.
• Red Team Village – Offensive security tactics and penetration testing.
• Social Engineering Village – Exploring human-based hacking techniques.
• AI & Machine Learning Village – Security implications of AI advancements.
• Quantum Village – Discussions on quantum computing and cryptography.

DEF CON is known for its underground, community-driven atmosphere, where attendees can participate in live hacking challenges, workshops, and networking events. Since you’re interested in cybersecurity conferences like THOTCON and BSides Chicago, DEF CON could be a great addition to your event lineup!

Who should attend?

DEF CON is open to anyone interested in cybersecurity, hacking, and technology. Attendees typically include:

• Security Professionals – Ethical hackers, penetration testers, and cybersecurity experts.
• Researchers & Academics – Those studying vulnerabilities, cryptography, and security trends.
• Government & Law Enforcement – FBI, DoD, DHS, and other agencies often attend.
• Developers & Engineers – Software and hardware specialists exploring security flaws.
• Students & Beginners – Those looking to learn about hacking and cybersecurity.
• Hackers & Enthusiasts – Anyone passionate about security, privacy, and ethical hacking.

How much does it cost?

Tickets for DEF CON 33 (2025) cost $540 if purchased in advance through Black Hat USA before August 1, 2025. After that date, tickets will only be available for purchase on-site at DEF CON during their ticket sales window.

This event listing is courtesy of the Assumed.com Events & Conferences Calendar.  Interested in learning how data seeding with Assumed can help you identify indicators of data leaks, detect insider theft, vet your data partners and vendors, and more?  Check us out.