Many service systems rely on verifiable identity-related information of their users.
Manipulation and unwanted exposure of this privacy-relevant information, however, must at …

In this paper we present ZKlaims: a system that allows users to present attribute-based
credentials in a privacy-preserving way. We achieve a zero-knowledge property on the basis …

Multiple threats have been identified when citizens interact with online services such as
unknown provenance of information, unknown quality of service providers, spread of fake …

Sharing credentials could raise privacy concerns. For digital credentials to be widely
accepted, there is a need for an end-to-end system that provides (i) secure verification of the …

Smart contracts often need to verify identity-related information of their users. However, such
information is typically confidential, and its verification requires access to off-chain …

With high efficiency, low overhead, and high scalability, consortium blockchains have been
gradually and deeply applied in various fields of society. Privacy preservation and …

Blockchain is one of the technology innovations for sharing data across organizations
through a peer to peer overlay network. Many blockchain-based data sharing applications …

The conventional public key infrastructure (PKI) model, which powers most of the Internet,
suffers from an excess of trust into certificate authorities (CAs), compounded by a lack of …

Trusted online credential management solutions are needed for instant and practical
verification. Most of the available frameworks targeting this field violate the privacy of end …

Identity sharing systems, regardless of their architectural models, share common
vulnerabilities. These systems compel users to divulge personal information and furnish …