Developing end-to-end encrypted instant messaging solutions for group conversations is an
ongoing challenge that has garnered significant attention from practitioners and the …

Data formats used for cryptographic inputs have historically been the source of many attacks
on cryptographic protocols, but their security guarantees remain poorly studied. One reason …

Abstract The Digital Markets Act (DMA) is a nascent European Union regulation adopted in
May 2022. One of its most controversial provisions is a requirement that so-called …

Amidst the ongoing anti-military protests in Myanmar since 2021, there is a noticeable
research gap on ICT-supported activism. Generally, ICTs play an important role during …

Cryptography serves as the cornerstone of information security and privacy in modern
society. While notable progress has been made in the implementation of cryptographic …

In an effort to enhance the attractiveness of apps, developers consistently and frequently
release updates to introduce new features and address known issues. Although frequent …

We analyse the cryptographic protocols underlying Delta Chat, a decentralised messaging
application which uses e-mail infrastructure for message delivery. It provides end-to-end …

European lawmakers have ruled that users on different platforms should be able to
exchange messages with each other. Yet messaging interoperability opens up a Pandora's …

Nair and Song (USENIX 2023) introduce the concept of a Multi-Factor Key Derivation
Function (MFKDF), along with constructions and a security analysis. MFKDF integrates …

This paper summarizes our cryptanalysis results on real-world End-to-End Encryption
(E2EE) schemes published in recent years. Our targets are LINE (a major messaging …