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 …

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

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

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

Anonymous messaging and payments have gained momentum recently due to their impact
on individuals, society, and the digital landscape. Fuzzy Message Detection (FMD) is a …

In the realm of privacy-preserving blockchain applications such as Zcash, oblivious
message retrieval (OMR) enables recipients to privately access messages directed to them …

Recent developments in cryptography enable a system of Oblivious Message Retrieval
using Homomorphic Encryption schemes. Oblivious Message Retrieval allows for untrusted …