Membership revocation is essential for cryptographic applications, from traditional PKIs to
group signatures and anonymous credentials. Of the various solutions for the revocation …

Certification of keys and attributes is in practice typically realized by a hierarchy of issuers.
Revealing the full chain of issuers for certificate verification, however, can be a privacy issue …

Zero-knowledge set membership (ZKSM) proof is widely used in blockchain to enable
private membership attestation. However, existing mechanisms do not fully consider …

Many Experts believe that the Internet of Things (IoT) is a new revolution in technology that
has brought many benefits for our organizations, businesses, and industries. However …

Methods and systems are provided for demonstrating autho rization to access a resource to
a verifier computer control ling access to the resource. The method comprises, at a user …

The notion of domain-specific pseudonymous signatures (DSPS) has recently been
introduced for private authentication of ID documents, like passports, that embed a chip with …

This article proposes a novel method for managing usage counters within an anonymous
credential system, addressing the limitation of traditional anonymous credentials in tracking …

Mobile devices are increasingly used in security-sensitive contexts such as physical access
control and authorization of payment transactions. In this paper we contribute a mechanism …

With the increasing use of online services, the protection of the privacy of users becomes
more and more important. This is particularly critical as authentication and authorization as …

Cybercrime and cyberterrorism research faces a number of challenges, such as the rate of
change in technology, field complexity and interdisciplinarity. This chapter aims at identifying …