The International Workshop on Blockchain for Decentralized Trust and Digital Identity (B4TI) addresses the fundamental challenge of establishing trust in digital environments. In an increasingly digital world, trust has become the cornerstone of all online interactions, yet the mechanisms to establish it reliably, efficiently, and equitably remain elusive. This workshop explores technological solutions to this core problem, focusing on approaches that enhance digital trust while respecting user autonomy.
Self-sovereign identity (SSI) represents a paradigm shift in addressing these challenges, emphasizing user control over personal data and identity claims. While SSI is conceptually independent of any specific technology, decentralized technologies such as blockchain, Distributed Ledger Technologies (DLTs), and advanced cryptographic mechanisms offer promising tools to implement SSI principles in practice. These technologies can provide the infrastructure for transparent, tamper-resistant, and user-controlled trust frameworks that reduce dependency on centralized authorities.
The workshop is particularly interested in, but not limited to, research topics including the following:
- Trust Models and Architectures: Investigating how trust relationships can be formalized, operationalized, and technically implemented across diverse contexts and domains, emphasizing frameworks that can adapt to different organizational structures and technical environments.
- Blockchain and Decentralized Technologies: Examining how blockchain, distributed ledgers, and other decentralized infrastructures can provide the technical foundation for tamper-resistant, transparent, and verifiable identity systems.
- Self-Sovereign Identity Principles: Exploring architectures and implementations that enable individuals to control their digital identities and personal data, focusing on user agency regardless of the underlying technology.
- Cryptographic Foundations: Investigating advanced cryptographic techniques such as zero knowledge proofs, threshold signatures, and secure multiparty computation that enable privacy-preserving verification and selective disclosure.
- Cross Trust Transfer: Addressing how trust established in one context can be securely transferred or recognized in other contexts while preserving user control and system integrity.
- Traceability and Data Provenance: Highlight traceability importance in decentralized identity ecosystems and AI systems. This includes tracking the origin and evolution of data, credentials, and AI model updates, supporting transparency, preventing fraud, verifying data provenance, and enabling accountable decision-making in IoT, digital twins, and supply chain management. For AI, traceability ensures model updates can be audited, malicious behavior detected, and training contributions verified.
- Governance and Standards: Developing frameworks that balance technical innovation with necessary governance measures, examining how standards and protocols, such as eIDAS 2.0 and GDPR, can enable interoperability while preserving flexibility and compliance. Lifecycle management of identifiers, including assignment, updating, and revocation, is a key aspect.
- Real World Applications: Showcasing implementations and use cases across sectors, including finance, government services, healthcare, education, supply chain, and digital commerce that demonstrate the practical value of enhanced trust frameworks.
General Co-Chair
- Nicolò Romandini, Alma Mater Studiorum – University of Bologna, Bologna, Italy
- Kai Otsuki , NTT Digital, Inc. and NTT DOCOMO, Inc., Tokyo, Japan
Steering Committee
- Antonio Ken Iannillo, University of Luxembourg, Luxemburg
- Rebecca Montanari, Alma Mater Studiorum – University of Bologna, Bologna, Italy
KEYNOTE SPEAKERS
BCCA2025 Keynote at https://bcca-conference.org/2025/keynote.php
Authors Submission Guidelines:
Submission Site:
Paper format
Submitted papers (.pdf format) must use the A4 IEEE Manuscript Templates for Conference Proceedings. Please remember to add Keywords to your submission.
Length
The paper submission length according to each category (Overlength charges will be applied!):
- Long papers: (7-8 pages).
- Short papers: (5-6 pages).
- Poster papers: (1-2 pages).
Originality
Papers submitted must be the original work of the authors. The may not be simultaneously under review elsewhere. Publications that have been peer-reviewed and have appeared at other conferences or workshops may not be submitted. Authors should be aware that IEEE has a strict policy with regard to plagiarism https://www.ieee.org/publications/rights/plagiarism/plagiarism-faq.html The authors' prior work must be cited appropriately.
Author list
Please ensure that you submit your papers with the full and final list of authors in the correct order. The author list registered for each submission is not allowed to be changed in any way after the paper submission deadline.
Proofreading:
Please proofread your submission carefully. It is essential that the language use in the paper is clear and correct so that it is easily understandable. (Either US English or UK English spelling conventions are acceptable.)
Publication:
All accepted papers in the workshops colocated with BCCA 2025 will be submitted to IEEEXplore for possible publication.
Program
The program will be announced with the BCCA2025 program at https://bcca-conference.org/2025/program.php
Venue
For venue and acomodoation information, please visit https://bcca-conference.org/2025/hotel-and-travel.php
Registration
For registration information, please visit https://bcca-conference.org/2025/registration.php
Camera Ready
For registration information, please visit https://bcca-conference.org/2025/cameraready.php
