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 …

Anonymous message delivery systems, such as private messaging services and privacy-
preserving payment systems, need a mechanism for recipients to retrieve the messages …

Anonymous message delivery, as in private communication and privacy-preserving
blockchain applications, ought to protect recipient metadata: a message should not be …

Private messaging systems that use a bulletin board, like privacy-preserving blockchains,
have been a popular topic during the last couple of years. In these systems, typically a …

We introduce the problem of private signaling. In this problem, a sender posts a message on
a certain location of a public bulletin board, and then posts a signal that allows only the …

Anonymous message delivery, as in privacy-preserving blockchain and private messaging
applications, needs to protect recipient metadata: eavesdroppers should not be able to link …

Fuzzy message detection is a novel cryptographic primitive in which the remote storage
cloud can help the client carry out fuzzy detections with some false-positive rate. This …

Stealth addresses are a privacy-enhancing technology that provides recipient anonymity on
blockchains. In this work, we investigate the recipient anonymity and unlinkability …

Internet voting systems are supposed to meet the same high standards as traditional paper-
based systems when used in real political elections: freedom of choice, universal and equal …

Oblivious message retrieval (OMR) allows messages resource-limited recipients to
outsource the message retrieval process without revealing which messages are pertinent to …