Erik Andersen
Editor of ITU-T X.509 | Independent Consultant, Andersen, L-Service, Denmark
Erik Andersen was employed by IBM for 27 years and was in the early 1980th appointed by IBM to be the IBM representative in Danish Standards (OSI). Became chair of the Danish committee for Open Systems Interconnection standardization and participated in numerous international meetings within ISO/IEC and was quite active. After leaving IBM, continued to work for international standardization in European standardization arena. Was during four study periods rapporteur for the question, currently Question 11, that is responsible for the ITU.T X.500 series, which is collaborative work with ISO/IEC, which has published the series as ISO/IEC 9594-all parts. Has for 12 years or more been the project editor for the ITU-T X.500 series, also on the ISO/IEC side. Rec. ITU-T X.509, alias ISO/IEC 9594-8, is part of the ITU-T X.500 series. X.509 being the framework for public-key infrastructure is an extremely important specification.
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 Abbie Barbir
Q10/17 Co-Rapporteur
Dr. Abbie Barbir is a leader in digital security and identity management with over 25 years of experience. He is the Co-Rapporteur of ITU-T SG 17 Q10/17 Identity and Access management question. As a Senior Security Advisor, his work spans AI, Agentic AI, IAM, mobile security, and the development of user-friendly, resilient authentication protocols. Dr. Barbir holds a Ph.D. in Computer Engineering. He has many innovations in data compression, encryption, and secure algorithm design to enhance digital identity verification
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 Sofia Celi
Senior Cryptography Researcher, Brave
Sofía Celi is a Senior Cryptography Researcher at Brave, specializing in privacy-enhancing technologies, post-quantum cryptography, and secure communication systems. She is a member of the Advisory Council at the Open Technology Fund (OTF) and holds leadership roles within the IETF, IRTF, and W3C. Sofía has also provided expert consultations for the United Nations and human rights organizations. As a co-founder of Criptolatinos and Women in Cryptography, Sofía is committed to fostering diversity in cryptography and security. She is actively engaged in the academic community, serving as a member of the Latincrypt Steering Committee, Publicity Co-Chair of the PETS Symposium, IACR ePrint Co-Editor, and IEEE Security & Privacy Ethics Co-Chair. Sofía has received two Distinguished Paper Awards at IEEE S&P and NDSS, was a runner-up for the Best Paper Award at ESORICS and for the Pwnie Award. She lives with her amazing partner and has two beloved dogs.
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Jad el Cham
Senior Public Policy Technical Advisor, RIPE Network Coordination Center
Jad El Cham is a network engineer and cyber security enthusiast with extensive knowledge in designing, deploying and securing networks. Passionate about driving positive change in the telecommunications sector, Jad is currently serving as a Senior Public Policy Technical Advisor at RIPE NCC, the Regional Internet Registry serving Europe, Central Asia and the Middle East. His role involves engaging in strategic policy developments and monitoring emerging technology trends. Jad also focuses on capacity building and community knowledge sharing through dedicated workshops and tailored activities for network operators, universities, law enforcement agencies, banking institutions and government regulators. Before joining the RIPE NCC, Jad was in charge of deploying IP networks for SMEs and service providers in Europe, Middle East and Africa. His experience spans the networking domain, IoT and mobile access technologies.
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 Steffen Fries
Principal Engineer Security, Siemens AG, Germany
Steffen Fries is working in the area of cybersecurity within Siemens Technology for more than 25 years. As principal engineer he mainly focuses on the analysis, design, and implementation of secure communication solutions for different verticals. This requires collaborating with system architects, implementers, and product management in order to design secure solutions. Within standardization, he is editor of and contributor to several IEC 62351 documents in the IEC TC for power system automation. Besides this he is active in IEEE to secure time synchronization for the precision time protocol IEEE 1588. In the IETF his main interest is in group key management as well as the management of certificates in PKIs.
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 William Kadio
Deputy Director of Digital Transformation at ARTCI (Autorité de Régulation des Télécommunications/TICs de Côte d'Ivoire)
An expert in digital transformation, digital identity and ISO 27001 Lead Auditor, William KADIO has over 10 years' experience in digital transformation, information systems security management and digital trust service infrastructure (PKI, electronic signature). At the Autorité de Régulation des Télécommunications/ TICS de Côte d'Ivoire (ARTCI), he contributes to the management of government digital trust services and helps to improve the regulatory framework for cybersecurity, data protection and digital trust. Its flagship projects are the development of the national cybersecurity strategy, the digital signature of administrative acts and the build of Côte d'Ivoire's national PKI root.He represents Côte d'Ivoire on Study Group 17 of the ITU Standardisation Sector, and is an active member of the SG17 Africa regional group. He is also a member of the OSIA (Open Standard Identity APIs) advisory committee of the Secure Identity Alliance.
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 Hoyt L Kesterson II
Senior Security & Risk Architect, CNC Consulting
Hoyt L Kesterson II is a Security & Risk Architect with CNC Consulting. He has more than 40 years of experience in information security. For 21 years he chaired the international standards group that created the X.509 public-key certificate, a fundamental component in digital signature and securing web transactions. He is a co-chair and founding member of the ABA's Information Security Committee. He is a testifying expert. He holds the CISSP and CISA certifications. He has three articles published in The SciTech Lawyer—What's Quantum Computing Got to Do with It? in the Spring 2022 issue;
Cryptocurrency: A Need for Integrity in the Summer 2023 issue; and
The Synergy of SciTech and the RSA Conference, co-authored with Ruth Hill Bro, in the Fall 2024 issue.
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 Assaf Klinger
Head of R&D, Vaulto
Assaf Klinger is an accomplished entrepreneur, specializing in AI/ML, cryptography, blockchain and Telecom. In the last 7 years, Assaf has founded two startups, one in the crypto-currency AML/CTF space and the other is in the AI/ML space. Assaf also consults the ITU (International Telecomunication Union) and several developing countires on establishing a secure telecom-crypto-based payment systems using CBDCs (Central Bank issued Digital Currency) A native of Israel, Assaf has over 20 years' experience as a software & hardware developer and as a security researcher with specialty in cyber-telecom and blockchain vulnerability research. Assaf is an IDF intelligence corps. veteran of 13 years (Maj. Ret.) and has led the development of many complex systems, for this Assaf was decorated in 2011 with the Israel Defense award, the highest award a non-combatant in Israel, given for exceptional technological achievements and major contribution to the security of Israel. Assaf has a BSc. in electrical engineering from Tel-Aviv university and an MBA from the Technion. Assaf is a family man, married with twins, in his spare time he enjoys tinkering with IoT electronics and music.
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 Stiepan Kovac
QRC Eurosmart SA, Luxembourg
Mr. Kovac, CEO of the QRC group of companies (Quantum Resistant Cryptography), sparked ISO/IEC JTC1 SC27 18033-2 Amd2 with the goal to add « post quantum » ciphers to that standard, likewise is the editor of ITU-T X.1197 Amd1 (2019), the first ever comprehensive quantum resistant cryptography recommendation, followed by X.1811 which provides it with a good practice for use in 5G networks and H.551 which extends its recommended use to vehicular multimedia. He is also the main driving force of European cryptography standardization with DIN SPEC 4997 as foundational work, soon to become an EN, likewise a renowned expert in US national security and defense circles on the question of qrc as a field and how to make it secure. He’s also an author in the SC27 journal, on the subject of "how to make cryptographic standards secure in practice.”
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 Stephen Mason
Visiting Professor, National University of Singapore
Professor Stephen Mason is a legal scholar and practitioner, known for his expertise in electronic evidence and technology law. He was called to the Bar by the Honourable Society of the Middle Temple in 1988 and has served as a Visiting Lecturer at the School of Law, University of Tartu, Estonia, as well as an Associate Research Fellow at the Institute of Advanced Legal Studies. Professor Mason is also affiliated with the Centre for Technology, Robotics, Artificial Intelligence & the Law at NUS Law. He is notably the joint editor, alongside Professor Daniel Seng, of the practitioner text Electronic Evidence and Electronic Signatures (5th edition, Institute of Advanced Legal Studies for the SAS Humanities Digital Library, School of Advanced Study, University of London, 2021) (https://uolpress.co.uk/book/electronic-evidence-and-electronic-signatures/) and is recognised for his extensive work in the field of law and technology
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 Zoe Sungchae Park
Researcher of Cybersecurity Emerging-Standards Center (CESC), Soonchunhyang University, Korea, (Rep. of)
Ms Zoe Sungchae Park received her Bachelor’s degree in 2008 from Soonchunhyang University, Korea. She is currently pursuing an integrated Master’s and PhD programme, which she is expected to complete in 2024, and works at the Cybersecurity Emerging-Standards Center (CESC) of Soonchunhyang University as a senior researcher. She is a founding member of VODABI, a company specialising in AI-based conversation analysis, and has over 10 years of industry experience in the security field, including roles in security vendors and the financial sector. She currently serves as the Rapporteur for Q1 in ITU-T SG17 and is the editor of multiple standardisation documents(X.sr-ai, X.st-ssc, etc) on cybersecurity in ITU-T. She has also served as a co-chair of Correspondence Group to SG17 Restructuring (CG-RES).
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 Arnaud Taddei
CEO, Chair, ITU-T Study Group 17, Security | Broadcom
Mr. Arnaud Taddei is a Global Security Strategist at Symantec by Broadcom. He is an executive advisor on Security Strategy and Transformation for the top 150 Symantec customers. As part of his mission, M. Taddei participates in specific Standardization Defining Organizations and in particular, was elected ITU-T SG17 Chair representing the UK and works at the IETF. He started his career in 1993 at the famous CERN IT Division in Geneva which created the World Wide Web and where he led the team responsible for Communication, Authentication and Authorization. In 2000, he joined Sun Microsystems where he became one of the 100 elected global Principle Engineers. In 2007 he joined Symantec and hold Chief Architect roles up to Director of Research as direct report to Dr. Hugh Thompson, Symantec’s CTO and actual RSA Conference Chair. Graduated as Telecom Engineer from the Ecole Nationale Supérieure de Télécommunication de Bretagne, France, M. Taddei owns a DEA with INRIA, which led him to the Institute of Control Sciences, Russian Academy of Sciences, Moscow in 1992.
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