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Yeonwoo Park previously conducted penetration testing projects targeting Korean companies at his former workplace (Core Research Team at Raon Secure) and currently serves as a red teamer at his current workplace (Cyber Threat Analysis Team at SK AX).Through his AD zero-day research, he discovered an exception-handling flaw in the Kerberos protocol, uncovering a method to bypass Microsoft's security policies. Furthermore, through continuous research into areas undetected by popular open-source tools like BloodHound and unexplored topics, he contributes to enhancing the maturity of the red team.

Hi, My name is Aftab Sama! 👋I'm a cybersecurity researcher. I graduated from Rashtriya Raksha University with a degree in Computer Science and Engineering with specialization in Cyber Security. My interest in Capture the Flag (CTF) competitions helped me secure my first internship at KPMG India, as I was among the top performers in a national CTF competition organized by the KPMG Cyber Security Team. I secured an on-campus internship at Quick Heal, where I had the opportunity to shadow various malware cases and learn about the investigation process. I validated Indicators of Compromise (IoC) for physical samples from CertIN and OTX, and I utilized my Python skills to automate some daily tasks. I also ranked among the top 100 in TCS HackQuest Season 7 Capture the Flag (CTF) competition, which led to an employment opportunity with TCS, where I am currently working as Penetration Tester.My passion for offensive security and penetration testing led me to obtain certifications such as CAPenX, BSCP, CNPen, CAPen, and CEH Practical, among others. I plan to enroll in further offensive security courses in the future.In my free time, I actively participate on HackTheBox and CTFTime and have taken part in several prestigious CTF competitions, winning multiple prizes. Besides my interest in security, I enjoy reading about stoicism and philosophy.You can read my blogs and writeups at https://aftabsama.com.

Alfonso De Gregorio is a globally recognised cybersecurity technologist, award-winning research artist, and strategic policy advisor. He has spoken at 25+ peer-reviewed int'l events across 5 continents, such as NATO Conference on Cyber Conflict, RSAC, and the leading hacker events. High-performance organisations engage him to spearhead relentless innovation across disciplines and fields, accelerate asymmetric advantage, and achieve peak confidence in today's interconnected operational environment—establishing Alfonso as a key figure shaping the discussion and practice of cybersecurity.Today he is Founding Director and Principal Investigator at Pwnshow, an interdisciplinary research agency investigating critical cybersecurity challenges at the complex technology-society nexus; CEO at Zeronomicon, a premium zero-day vulnerability acquisition platform; and, Member of the ETSI TC SAI (Securing AI), where he works towards ensuring the technical standards underpinning the EU AI Act are practical, effective, and innovation-friendly. At the forefront of the AI governance debate, his current work focuses on the dual-use dilemma of open-weight AI and how the proliferation of powerful models impacts the cyber threat landscape. Active in the legislative and standardization trenches as much as at the terminal prompt, he provided expert technical consultation to the European Commission regarding the EU AI Act. He successfully advocated for the "substantial modification" clauses in the GPAI Code of Practice, protecting open model developers from undue liability.

Alon Friedman is a Principal Security Architect at Microsoft 365 Defender, with extensive experience in application security and penetration testing. He focuses on defining application security standards and researching threat landscapes. His background includes leading secure software development at Salesforce and managing application vulnerabilities at PayPal. Alon is a recognized researcher, credited with CVE-2014-4246 and the creation of the SCIP OWASP ZAP extension

Speaker at multiple International Security conferences: NullCon, AVAR Singapore, AVAR Chennai, Bsides Delhi. Did first lock picking workshop in India with Nullcon in 2012 and multiple lock picking workshops in Nullcon , Hackers conference.  Did workshop on Arduino in NullCon hackers conference and created first ever Hardware badge in India for Hackers conference.

Andreas Wiegenstein is engaged in SAP cyber security since 2003. He discovered quite a number of zero-day vulnerabilities in SAP software and supported development of a market leading static code analysis tool for the business programming language ABAP. He has spoken at more than 70 conferences world-wide about SAP security, including Black Hat, DeepSec, Hack In The Box, IT Defense, RSA, SAP TechEd and Troopers (alphabetical order). His current research is focused on SAP malware and supply chain attacks.

Chris Carlis is an unrepentant penetration tester with an extensive background in network, wireless and physical testing. Across his career, Chris has worked to expand the value offensive testing provided via open communication and goal driven engagements. Additionally, Chris has presented at a variety of conferences, including Thotcon, Hushcon, Hackfest, ShowMeCon, DeepSec, CypherCon and various B-Side events. He is a perennial feature at the Thotcon conference in his native Chicago, USA and helps to organize “BurbSec”, the best attended Information Security monthly gatherings in the country. 

Donavan is a Physics graduate turned into cybersecurity consultant with >8 years of experience in a variety of cybersecurity domains (e.g. offensive security, threat modeling, maturity assessments, security architecture) and business domains (cyber GRC).He blends his understanding of clients across both public and private sectors to identify key cybersecurity concerns and solutions to enable companies' cybersecurity compliance, confidence and cost-effectiveness (3 Cs).He has numerous contributions to the cybersecurity community since 2018. He has written hacking challenges, spoken at numerous conferences and events (SECCON JP, Threat Modeling Connect Japan, GCC 2025 @ Taiwan, Seasides 2025 @ Goa, SINCCON @ Singapore, DefCamp @ Romania) on topics ranging from threat modeling to application security. He has conducted career talks to encourage younger students from middle school to university levels to enter the cybersecurity industry. He also sits on the advisory board of VULNCON (since 2024), BSides Mumbai and Vazig, and has authored numerous articles on ISACA on topics ranging from post-quantum cryptography, to the relations between social sciences and cybersecurity as well as threat modelling. His views on cybersecurity has also been quoted by "The Pentester Blueprint" written by Phillip L. Wylie and Kim Crawley, and Offensive Security. He also contributes to the ISC2's Unified Body of Knowledge (UBK) through the Technical Advisory Panel Workshop.In Thales, he has also led a team to create a made in Singapore cybersecurity gamification experience, "Defend the Breach" (DTB), in three months, where players role-play CISO roles to make difficult cybersecurity decisions, taking into account both cyber and non-cyber factors such as the overall health of the business, manpower and operational requirements.Donavan also possesses certifications ranging from Offsec certifications (OSCE3, OSCP), ISC2 (CISSP), ISACA (CRISC) and is more than halfway through his Masters in Cybersecurity at Georgia Tech (OMSCY).On the mentorship front, he has developed and helped two mentees secure jobs, and mentors a dozen mentees in various capacities (individuals, cyber start-up founders)Outside cybersecurity, Donavan has also represented Singapore in international forums such as the ASEAN-India Youth Summit as a delegate.Find out more about me at https://donavan.sg and my cybersecurity writing at https://donavan.sg/blog.

Evan "Shortrange" Cook is a physical security researcher who is passionate about hacking the planet! A first-place winner of the DEFCON 2025 Embedded Systems Village CTF and SAINTCON 2024 RFID CTF, Evan knows how to train and speak success in RFID hacking. He is a battle-tested educator who has workshopped over 300+ students — ranging from newbies to industry professionals to tier-one special forces operators — in the art of successful access control exploitation. Committed to lowering the barrier of entry for beginners, he created the world's FIRST open-source access control simulation lab built entirely with off-the-shelf parts, proving that high-end security research doesn't require a high-end budget. Evan is passionate about "bringing RFID to the people" through talks, workshops, trainings, and open-source projects. Where digital and physical worlds collide... you'll find Shortrange ready to "Hack the Planet!" with you.

Dr. Gregory Carpenter is Principal Partner at CW PENSEC and a retired U.S. Army officer with over two decades of operational experience spanning intelligence, counterintelligence, electronic warfare, deception, and security testing. He previously served in senior roles across joint and interagency environments and was recognized as NSA Operations Officer of the Year for his work in advanced operational analysis and mission execution.Dr. Carpenter’s professional focus centers on adversary modeling and the failure modes of trust, identity, and attribution under adaptive threat pressure. His work examines how emerging technologies—including cyber-physical systems, in vivo and nano-scale technologies, automation, and information operations—alter attacker behavior and invalidate long-standing defensive assumptions. He has led and advised offensive and defensive programs across cyber, information, and electronic warfare domains, with particular emphasis on how identity collapses when human operators are no longer stable or external to the systems they access.At conferences and in research settings, Dr. Carpenter translates complex adversary behavior into practical defensive insight, emphasizing how organizations must redesign identity, access control, and trust models for environments where compromise is expected rather than exceptional. He has presented at DEF CON’s Misinformation Village (2023), Adversary Village (2025), and the DEF CON Creator Stage (2024, 2025).

20 YearsBrazilianClient Applications Squad Leader, Researcher and Malware Developer at @Hakai Offensive SecurityProgrammerGamerCat loverCompulsive pizza eaterPassionate about sysInternals, reverse engineering, low level and Client-Side applications

Mr Santarsieri is a founder partner at Vicxer where he utilizes his 16+ years of experience in the security industry, to bring top notch research into the ERP (SAP / Oracle) world.He is engaged in a daily effort to identify, analyze, exploit and mitigate vulnerabilities affecting ERP systems and business-critical applications, helping Vicxer's customers (Global Fortune-500 companies and defense contractors) to stay one step ahead of cyber-threats.Jordan has also discovered critical vulnerabilities in Oracle, IBM and SAP software, and is a frequent speaker at international security conferences such as Black-Hat, Insomnihack, YSTS, Auscert, Sec-T, Rootcon, NanoSec, Hacker Halted, OWASP US, Infosec in the city, Code Blue and Ekoparty.

Mohit Kulamkolly works at Netskope as an Security Analyst ll - Red team and Offensive Operations, a Santa Clara-based company that offers the Cloud Native Security Platform to assist enterprises secure their growing cloud footprint.He has been working with the Appsec division Pen-testing applications and product features for more than 4 years , in addition to making sure firms’ product development projects are secure. His particular areas of interest are binary exploitation, fuzzing, exploit development and reverse engineering. In his tenure at Netskope he has discovered multiple critical vulnerabilities within the Application and driven by passion for cutting edge research in his domain. An accomplished speaker, he presented at Black Hat Europe Arsenal 2025 and has delivered over 10+ technical presentations to a diverse range of product development disciplines within his current organization. His research has made contributions to the cyber security community including reporting CVE-2024-46455 and open source contributions.

Louis Nyffenegger is an experienced speaker and trainer known for delivering high-impact talks on web security, vulnerability research, and security code review.Highlights include:Keynote Speaker at BSides Canberra Delivered the keynote “A journey to Mastery” sharing actionable strategies for building skills.DEF CON: multiple workshops and talks at DEFCON and villages on SAML, JWT and code reviewOWASP California: talk on JWTNumerous talks at meetups, private workshops and training sessions with top red teams, pentesters, and application security teams worldwide.Louis’s talks are known for blending technical depth with practical, experience-driven advice, helping attendees level up their security skills beyond checklists and automated tools.

Markus Vervier is a security researcher from Germany. Software security is his main focus of work. During the last 15 years he collected professional experience in offensive IT security working as a penetration tester and security consultant for highly regarded companies. His experience combined with his personal passion regarding security research made him start his own company in 2015. Besides his daily security work, he is very actively practicing security research and discovers high profile vulnerabilities regularly such as the recent libotr heap overwrite.

Over 14 years of experience in the security domain, specializing in Penetration Testing, Application Security, Cloud Security, Architecture and Forensics Investigation.Leading an Offensive Security (OffSec) team with a passion for Red Teaming and Security Research.Reported multiple vulnerabilities in products and applications, recognized with CVEsHolds prestigious certifications including GIAC Cloud Penetration Tester (GCPN), Offensive Security Certified Professional (OSCP), Offensive Security Wireless Professional (OSWP), Certified Red Team Operator (CRTO), among othersPresented at prominent conferences such as Bsides Budapest, Bsides Milano, Hacktivity, VulnCon 2024, Hacker Halted, CyberSec Asia, Identity Shield, Microsoft BlueHat 2025, PHDays 2025, VulnCon 2025, OWASP AppSec Days 2025, Hacker Halted 2025.

Orange Tsai is the principal security researcher of DEVCORE and a core member of CHROOT security group in Taiwan. He is also the champion and title holder of 'Master of Pwn' in Pwn2Own Vancouver 2021 and Toronto 2022. Additionally, Orange has spoken at several top hacking conferences, such as Black Hat USA (6 times), DEF CON (5 times), HITCON (12 times), CODE BLUE (6 times), POC, Hexacon, RomHack, HITB, and WooYun!Currently, Orange is a 0day researcher focusing on Web and Application Security. His research not only earned him the Pwnie Awards winner for "Best Server-Side Bug" in 2019 and 2021 but also secured 1st place in the "Top 10 Web Hacking Techniques" for 2017, 2018 and 2024. In his free time, Orange also engages in bug bounties. He is especially enthusiastic about RCE, successfully identifying critical RCEs across a broad range of vendors, including Twitter, Facebook, Uber, Apple, Netflix, Tesla, GitHub, Amazon, and more.

Patrick Ventuzelo is a senior security researcher, CEO & founder of Fuzzinglabs. After working for the French Ministry of Defense, he specialized in fuzzing, vulnerability research, and reverse engineering. Over the years, Patrick has created multiple fuzzers, found hundreds of bugs, and published various blog posts/videos/tools on topics like Rust, Go, Blockchain, WebAssembly, and Browser security. Patrick is a regular speaker and trainer at various security conferences around the globe, including BlackHat USA, OffensiveCon, REcon, RingZer0, PoC, ToorCon, hack.lu, NorthSec, SSTIC, and others.

Pengfei is a Solution Architect at Picus Security, where he advise enterprise security teams in implementing automated adversary simulation operations and framework.Previously, he worked as a Cybersecurity Engineer in GovTech's GCSOC team, where he led the implementation of continuous purple teaming across the Whole-of-Government. Before this role, he served on GovTech's red team, mainly dabbling in VAPT and Adversary Simulation.Pengfei is certified with OSCP, eMAPT, Crest CRT, CCSK V4, etc. He has conducted research on emerging cybersecurity technologies and presented his findings at renowned conferences like Black Hat USA & Asia, DEFCON, SINCON, ROOTCON, etc.

Pramod Rana is author of below open source projects:Omniscient - LetsMapYourNetwork: a graph-based asset management framework CICDGuard - Orchestrating visibility and security of CICD ecosystem vPrioritizer - Art of Risk Prioritization: a risk prioritization frameworkHe has presented at BlackHat, defcon, nullcon, OWASPGlobalAppSec, HITB, CyberConAus, rootcon, AppSecNZ, HackMiami, HackInParis, CodeBlue and Insomnihack before. He is OWASP Pune chapter lead.He is leading the application security function in Netskope with primary focus on integrating security controls in the development process and providing security-testing-as-a-service to engineering teams.

Rahul Binjve (c0dist) currently leads the Cyber Threat Intelligence (CTI) Engineering team at Fortinet. With over a decade of experience in aggregating and contextualizing various threats, he's a seasoned threat intelligence practitioner. Rahul has presented and conducted workshops at several international conferences, including Black Hat, Nullcon, PHDays, c0c0n, Seasides, and BSides. He's also contributed to multiple open-source security projects, such as the SHIVA spampot and Detux Linux sandbox. Rahul's passions lie in information security, automation, human behavior, and—of course—breaking things.

I'm a security researcher with a passion for OS internals and all things low-level. Over the years I have specialised in Android & the Linux kernel, but have dabbled in a number of domains. When I'm not figuring out how things work and breaking them, I love to share my experiences and help others; whether it's via my blog, talks or mentoring.

I got into cybersecurity the messy, curious way - hacking games as a teenager to get extra coins and superpowers, then later reverse-engineering ransomwares to understand how they worked. That same curiosity and passion led me to a career in offensive cyber security.In the past 5+ years of work experience across India, UAE & USA, I’ve worked on:• Mobile application penetration testing (Android & iOS)• Web application and API penetration testing• Secure code review across C/C++, Python, Java, Golang, JavaScript, Typescript and C# .NET• Custom Signature Code Analysis (Semgrep, YARA & Coverity CodeXM custom checkers)• Adverserial tradecraft and Cyber threat intelligence• Network and infrastructure assessments with Segmentation penetration tests for cloud and on-prem setups• Software Composition Analysis (Coverity, Black Duck, GitHub Advisories, PlexTrac)• Innovative research & automated pentest tools development (AI, OSINT, Python, Bash script)Currently, I work as a Security Researcher at OnDefend, where I help secure user data of a large-scale social media platform & contribute to U.S. national security.🌟 Key Achievements:• Awarded the first-ever “Magical Mention” as an intern at Equinix for uncovering and reporting multiple critical security misconfigurations. Recognized for investigative persistence, curiosity, and successfully improving internal security workflows through proactive analysis and alerting.• Bug Bounty & Hall of Fame mentions: Tesco, IKEA, SecureLayer7 live hacking event, Accenture, Ericsson, Springer Nature, OSIsoft🔍CVE Research:• CVE-2020-11539 : Access control issue in Tata Sonata Smartwatch• CVE-2020-11540 : Access control issue in Tata Sonata Smartwatch• CVE-2020-25498 : Chained CSRF & Stored XSS vulnerabilities in Beetel router• CVE-2020-35262 : Stored XSS vulnerability in Digisol router👾 Outside of work, I’m always exploring new tools, ways to use AI as leverage in security, hacking techniques & trying to level up. I love building my own custom IoT devices as well as hacking them.🧑‍🤝‍🧑As an active member of 'Women in Cybersecurity', 'Women in Security & Privacy' and 'The Diana Initiative' volunteer at Defcon, I’m also passionate about making cyber security more inclusive and human, especially for women and underrepresented voices.

Cybersecurity Consultant with over three years of hands-on industry experience, I specialize in offensive security—driven by a passion for uncovering and exploiting weaknesses before adversaries can. My work spans Red Team operations, Network Security, and Web/API Vulnerability Assessment & Penetration Testing (VAPT), with successful engagements across BFSI, IT Products & Services, and Healthcare sectors.With a strong research focus on Adversarial Tactics, Techniques, and Procedures (TTPs), I continuously explore emerging threat vectors and offensive methodologies to deliver actionable security insights that directly reduce business risk. My approach blends technical precision with creative attack strategies, ensuring organizations stay ahead of evolving cyber threats