Personal data are often collected and processed in a decentralized fashion, within different
contexts. For instance, with the emergence of distributed applications, several providers are …

We construct a short group signature scheme. Signatures in our scheme are approximately
the size of a standard RSA signature with the same security. Security of our group signature …

This paper provides theoretical foundations for the group signature primitive. We introduce
strong, formal definitions for the core requirements of anonymity and traceability. We then …

Recently, a first step toward establishing foundations for group signatures was taken [5], with
a treatment of the case where the group is static. However the bulk of existing practical …

In this paper, we investigate the recent paradigm for group signatures proposed by Rivest et
al. at Asiacrypt'01. We first improve on their ring signature paradigm by showing that it holds …

Abstract We introduce Ad hoc Anonymous Identification schemes, a new multi-user
cryptographic primitive that allows participants from a user population to form ad-hoc groups …

This work presents a new privacy primitive called “Traceable Signatures”, together with an
efficient provably secure implementation. To this end, we develop the underlying …

We present the first efficient group signature scheme that is provably secure without random
oracles. We achieve this result by combining provably secure hierarchical signatures in …

In most common mobile ad hoc networking (MANET) scenarios, nodes establish
communication based on long-lasting public identities. However, in some hostile and …

Several interesting group signature schemes have been proposed to-date. However, in
order for the entire group signature concept to become practical and credible, the problem of …