The "2nd International Workshop on Trends in Digital Identity" (TDI 2024) was held in the historic city of Rome, Italy, on April 9, 2024. Hosted within the Auditorium Antonianum, the workshop brought together a diverse group of experts and practitioners to explore the latest developments and challenges in digital identity. TDI 2024 was co-located with the "9th OAuth Security Workshop" (OSW 2024), which took place from April 10 to 12, 2024, fostering further opportunities for collaboration.

In an era where digital services are rapidly expanding across sectors such as e-commerce, egovernment, healthcare, and financial services, reliable identity management has become a critical necessity. The workshop aimed to address key issues in this space, including technical challenges like security and interoperability, as well as legal and regulatory considerations around data protection and privacy. The growing complexity of digital identity systems requires input from various disciplines, and this workshop sought to bring together diverse perspectives to foster cross-sector collaboration.

The workshop featured a blend of invited talks by national and international experts, alongside presentations of innovative research contributions, which were submitted in response to an open call for papers. This format allowed for a comprehensive exploration of both theoretical and practical aspects of digital identity, ensuring a rich exchange of ideas.

The program was organized into five thematic sessions that reflected the multifaceted nature of digital identity:

• Government and Public Administration: Examined the evolving role of digital identities in the public sector, with particular attention to regulatory frameworks such as eIDAS 2 and the European Digital Identity (EUDI) Wallet. Government representatives shared their perspectives on the development, implementation, and future direction of digital identity solutions, examining the intersection of policy, technology, and user trust. The discussions highlighted the role of public institutions in driving the digital identity agenda, ensuring security, and fostering interoperability across national and international systems.

• Industry: Speakers from the private sector presented insights into the practical challenges and opportunities surrounding digital identity management in the industry. The talks explored the balance between security and usability, the role of trust services, and the technical frameworks that enable secure information exchange. The session also examined the growing need for interoperability between different identity systems and ecosystems, showcasing industry-driven innovations that are shaping the future of digital identity.

• Research and Innovation: Brought together researchers and innovators to discuss the latest advances in digital identity technologies. Topics included improving the trust and security of identity systems, automating identity processes, and exploring new models for decentralized and user-centric identity management. The speakers also addressed challenges related to interoperability, as well as novel cryptographic techniques that enhance privacy and control in digital identity solutions. This session highlighted the cutting-edge research in the digital identity field.

• Specifications and Standards: Explored the crucial role of standards in creating secure, interoperable, and scalable identity solutions. The speakers discussed key standards that underpin digital credentials, the ongoing push for broader adoption of digital identity wallets, and the importance of open standards in fostering innovation. The session emphasized the foundational role that well-developed standards play in enabling trusted digital identity frameworks.

• Round Table : Featured a multi-disciplinary round-table discussion on eIDAS 2. The panel brought together key stakeholders from various sectors, including a representative from government, a voice from the industry, and an expert in standards development. This diverse range of perspectives enriched the conversation, which focused on the practical challenges of adapting to the new regulatory landscape and strategies for ensuring effective cross-sector collaboration. The round table provided a comprehensive forum for sharing insights and identifying the next steps in the evolving digital identity ecosystem.

To conclude the workshop, a Welcome Reception was hosted in conjunction with OSW 2024 at Palazzo Merulana. Attendees had the opportunity to engage in meaningful conversations, share experiences, and forge new connections in a relaxed atmosphere. Additionally, participants were invited to explore a temporary art exhibition housed within the palace.

To collect and evaluate innovative research contributions, we released a public call for papers encouraging submissions on a range of topics, including but not limited to: In response to the call for papers, we received a total of 11 submissions. Each submission underwent a single-blind peer-review process conducted by at least two members of the Program Committee, who assessed the papers based on their technical quality, relevance, originality, significance, and clarity. As a result, 4 papers were accepted for publication in this volume (3 classified as regular papers and 1 as a short paper), while 2 papers were accepted solely for oral presentation at the workshop. Additionally, this volume includes invited papers derived from presentations given during the workshop.

Further details can be found on the official website of the event, available at the following link: https://st.fbk.eu/events/TDI2024/.