Over the last decades, numerous security and privacy issues in all three active mobile
network generations have been revealed that threaten users as well as network providers. In …

This paper aims at giving an overview of the different core protocols used for decentralized
chat and email-oriented services. This work is part of a survey of 30 projects focused on …

The Signal protocol is a cryptographic messaging protocol that provides end-to-end
encryption for instant messaging in WhatsApp, Wire, and Facebook Messenger among …

We present CONIKS, an end-user key verification service capable of integration in end-to-
end encrypted communication systems. CONIKS builds on transparency log proposals for …

Cryptography rearranges power: it configures who can do what, from what. This makes
cryptography an inherently\textit {political} tool, and it confers on the field an intrinsically\textit …

Many popular web applications incorporate end-toend secure messaging protocols, which
seek to ensure that messages sent between users are kept confidential and authenticated …

The computer security community has advocated widespread adoption of secure
communication tools to counter mass surveillance. Several popular personal communication …

Secure instant messaging is utilized in two variants: one-to-one communication and group
communication. While the first variant has received much attention lately (Frosch et al …

Popular messaging applications now enable end-to-end-encryption (E2EE) by default, and
E2EE data storage is becoming common. These important advances for security and privacy …

Many applications model their data in a general-purpose storage format such as JSON. This
data structure is modified by the application as a result of user input. Such modifications are …