Group signatures are an important anonymity primitive allowing users to sign messages
while hiding in a crowd. At the same time, signers remain accountable since an authority is …

Message-dependent opening is one of the solutions to solve the problem of the tracing
manager owns excessive power. In this paper, we present a new lattice-based fully dynamic …

Anonymous authentication primitives, eg, group or ring signatures, allow one to realize
privacy-preserving data collection applications, as they strike a balance between …

Group signatures allow members of a group to anonymously sign messages in the name of
this group. They typically involve an opening authority that can identify the origin of any …

This paper proposes an application-friendly group signature (GS) model for wireless ad hoc
network like Wireless Sensor Networks (WSN) or Vehicle ad hoc Network (VANET). Our new …

This paper introduces a new capability for group signatures called message-dependent
opening. It is intended to weaken the high trust placed on the opener; ie, no anonymity …

It is now known that more information can be leaked into the smart grid environment than
into the existing environment. In particular, specific information such as energy consumption …

We propose a group signature scheme with a function of designated traceability; each
opener has attributes and a signer of a group signature can be traced by only the openers …

If there are many displaced workers in a company, then a person who goes for job hunting
might not select this company. That is, the number of members who quit is quite negative …

The recent works of Ananth et al.(ITCS 2022) and Bartusek et al.(Eurocrypt 2023) initiated
the study of pre-constrained cryptography which achieves meaningful security even against …