The importance of safeguarding individuals' privacy rights in online activities is unmistakable
in today's anonymity networks. Since the introduction of Mixnet by Chaum, numerous …

Private payments in blockchain-based cryptocurrencies have been a topic of research, both
academic and industrial, ever since the advent of Bitcoin. Stealth address payments were …

Abstract Epidemics, such as Corona Virus Disease 2019 (COVID-19), have serious
consequences globally, of which the most effective way to control the infection is contact …

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 …

The advent of digital payments in the last few years had not only led to the proliferation of
electronic wallets or e-wallets where users deposit their funds and then use them to make …

Adaptor signatures are a new cryptographic primitive that binds the authentication of a
message to the revelation of a secret value. In recent years, this primitive has gained …

Anonymity networks, such as the Tor network, are highly decentralized and make heavy use
of ephemeral identities. Both of these characteristics run in direct opposition to a traditional …

Over the past decade, cryptocurrency has been undergoing a rapid development. Digital
wallet, as the tool to store and manage the cryptographic keys, is the primary entrance for …

Digital signature schemes with specific properties have recently seen various real-world
applications with a strong emphasis on privacy-enhancing technologies. They have been …

Post-quantum security is critical in the quantum era. Quantum computers, along with
quantum algorithms, make the standard cryptography based on RSA or ECDSA over FL or …