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Today, digital identity management for individuals is either inconvenient and error-prone or creates undesirable lock-in effects and violates privacy and security expectations. These shortcomings inhibit the digital transformation in…

Cryptography and Security · Computer Science 2023-11-06 Matthias Babel , Johannes Sedlmeir

Self-Sovereign Identity (SSI) aspires to create a standardised identity layer for the Internet by placing citizens at the centre of their data, thereby weakening the grip of big tech on current digital identities. However, as millions of…

Distributed, Parallel, and Cluster Computing · Computer Science 2022-08-15 Rowdy Chotkan , Jérémie Decouchant , Johan Pouwelse

The growing dependence on Electronic Identity Management Systems (EIDS) and recent advancements, such as non-human ID management, require a thorough evaluation of their trustworthiness. Assessing EIDS's trustworthiness ensures security,…

Cryptography and Security · Computer Science 2025-02-18 Mirko Bottarelli , Gregory Epiphaniou , Shah Mahmood , Mark Hooper , Carsten Maple

The amount of sensitive information that service providers handle about their users has become a concerning fact in many use cases, where users have no other option but to trust that those companies will not misuse their personal…

Cryptography and Security · Computer Science 2023-01-24 Xavier Salleras

Cyber-Physical Systems (CPS) provide enormous potential for innovation but a precondition for this is that the issue of dependability has been addressed. This paper presents the concept of a Digital Dependability Identity (DDI) of a…

Other Computer Science · Computer Science 2021-06-03 Daniel Schneider , Mario Trapp , Yiannis Papadopoulos , Eric Armengaud , Marc Zeller , Kai Hoefig

In the current paradigm of digital personalized services, the centralized management of personal data raises significant privacy concerns, security vulnerabilities, and diminished individual autonomy over sensitive information. Despite…

Cryptography and Security · Computer Science 2025-09-12 Osama Zafar , Mina Namazi , Yuqiao Xu , Youngjin Yoo , Erman Ayday

While the Internet was conceived as a decentralized network, the most widely used web applications today tend toward centralization. Control increasingly rests with centralized service providers who, as a consequence, have also amassed…

Computers and Society · Computer Science 2012-02-22 Arvind Narayanan , Vincent Toubiana , Solon Barocas , Helen Nissenbaum , Dan Boneh

The rapid advancement of ML models in critical sectors such as healthcare, finance, and security has intensified the need for robust data security, model integrity, and reliable outputs. Large multimodal foundational models, while crucial…

Cryptography and Security · Computer Science 2024-12-13 Hongyang Zhang , Yue Zhao , Claudio Angione , Harry Yang , James Buban , Ahmad Farhan , Fielding Johnston , Patrick Colangelo

"Distributed Identity" refers to the transition from centralized identity systems using Decentralized Identifiers (DID) and Verifiable Credentials (VC) for secure and privacy-preserving authentications. With distributed identity, control of…

Cryptography and Security · Computer Science 2025-01-17 Sina Ahmadi

Self-sovereign identity (SSI) is considered to be a "killer application" of blockchain. However, there is a lack of systematic architecture designs for blockchain-based SSI systems to support methodical development. An aspect of such gap is…

Software Engineering · Computer Science 2020-10-27 Yue Liu , Qinghua Lu , Hye-Young Paik , Xiwei Xu , Shiping Chen , Liming Zhu

Self-Sovereign Identity (SSI), as a new and promising identity management paradigm, needs mechanisms that can ease a gradual transition of existing services and developers towards it. Systems that bridge the gap between SSI and established…

Cryptography and Security · Computer Science 2024-01-19 Felix Hoops , Florian Matthes

Self-sovereign identity is the next evolution of identity management models. This survey takes a journey through the origin of identity, defining digital identity and progressive iterations of digital identity models leading up to…

Cryptography and Security · Computer Science 2021-11-04 Reza Soltani , Uyen Trang Nguyen , Aijun An

Know your customer (KYC) processes place a great burden on banks, because they are costly, inefficient, and inconvenient for customers. While blockchain technology is often mentioned as a potential solution, it is not clear how to use the…

Computers and Society · Computer Science 2021-12-03 Vincent Schlatt , Johannes Sedlmeir , Simon Feulner , Nils Urbach

Self-Sovereign Identity (SSI) is a novel identity model that empowers individuals with full control over their data, enabling them to choose what information to disclose, with whom, and when. This paradigm is rapidly gaining traction…

Cryptography and Security · Computer Science 2026-03-25 Alessandro Buldini , Carlo Mazzocca , Rebecca Montanari , Selcuk Uluagac

Self Sovereign Identity (SSI) is an emerging identity system that facilitates secure credential issuance and verification without placing trust in any centralised authority. To bypass central trust, most SSI implementations place blockchain…

Cryptography and Security · Computer Science 2023-08-04 Rahma Mukta , Rue C. Teh , Hye-young Paik , Qinghua Lu , Salil S. Kanhere

AI agents are autonomous entities that can be instantiated on demand, migrate across platforms, and interact with other agents or services without continuous human supervision. In such environments, identity is critical for establishing…

Cryptography and Security · Computer Science 2026-04-29 Minghui Xu , Xiaoyu Liu , Yihao Guo , Chunchi Liu , Yue Zhang , Xiuzhen Cheng

Contextual Integrity (CI) defines privacy not merely as keeping information hidden, but as governing information flows according to the norms of a given context. As large language models are increasingly deployed as personal agents handling…

Machine Learning · Computer Science 2026-05-21 Sangwoo Park , Woongyeong Yeo , Seanie Lee , Yumin Choi , Hyomin Lee , Kangsan Kim , Jinheon Baek , Seong Joon Oh , Sung Ju Hwang

Effective healthcare delivery depends on accurate longitudinal health records and addressing patients' concerns regarding the privacy of their information. While patient authentication is essential, reusing patient identifiers exposes…

Cryptography and Security · Computer Science 2026-03-10 Nasif Muslim , Jean-Charles Grégoire

Recently, a new paradigm called Differentiable Search Index (DSI) has been proposed for document retrieval, wherein a sequence-to-sequence model is learned to directly map queries to relevant document identifiers. The key idea behind DSI is…

Information Retrieval · Computer Science 2023-05-25 Yubao Tang , Ruqing Zhang , Jiafeng Guo , Jiangui Chen , Zuowei Zhu , Shuaiqiang Wang , Dawei Yin , Xueqi Cheng

Self-Sovereign Identity (SSI), a Blockchain-based technology for digital identity management, is a promising concept for handling health data. It could represent a step forward in empowering users, granting them control over their data.…

Cryptography and Security · Computer Science 2021-04-27 Alexandre Siqueira , Arlindo Flavio Da Conceição , Vladimir Rocha