Abstract Internet of Things (IoT) systems in different areas, such as manufacturing,
transportation, and healthcare, are the convergence of several technologies. There are …

Zcash is an implementation of the Decentralized Anonymous Payment scheme Zerocash,
with security fixes and improvements to performance and functionality. It bridges the existing …

Ledger-based systems that support rich applications often suffer from two limitations. First,
validating a transaction requires re-executing the state transition that it attests to. Second …

A chameleon-hash function is a hash function that involves a trapdoor the knowledge of
which allows one to find arbitrary collisions in the domain of the function. In this paper, we …

Despite their usage of pseudonyms rather than persistent identifiers, most existing
cryptocurrencies do not provide users with any meaningful levels of privacy. This has …

Bitcoin and other cryptocurrencies have recently introduced support for Schnorr signatures
whose cleaner algebraic structure, as compared to ECDSA, allows for simpler and more …

Applying consortium blockchain as a trust layer for heterogeneous industrial Internet-of-
Things devices is cost-effective. However, with an increase in computing power, some …

In this paper, we introduce a distributed key generation (DKG) protocol with aggregatable
and publicly-verifiable transcripts. Compared with prior publicly-verifiable approaches, our …

The FIDO2 standard is a widely-used class of challenge-response type protocols that allows
to authenticate to an online service using a hardware token. Barbosa et al.(CRYPTO '21) …

In many cryptocurrencies, the problem of key management has become one of the most
fundamental security challenges. Typically, keys are kept in designated schemes called …