Big data drive multidimensional convergence and profound innovations among industries
and provide novel ways of exploring the world. As they significantly create economic and …

We provide an extensive cryptographic analysis of Threema, a Swiss-based encrypted
messaging application with more than 10 million users and 7000 corporate customers. We …

This paper provides efficient authenticated-encryption (AE) schemes in which a ciphertext is
a commitment to the key. These are extended, at minimal additional cost, to schemes where …

This paper initiates research on zero-knowledge middleboxes (ZKMBs). A ZKMB is a
network middlebox that enforces network usage policies on encrypted traffic. Clients send …

AWS Lambda is a serverless event-driven compute service, part of a category of cloud
compute offerings sometimes called Function-as-a-service (FaaS). When we first released …

A core goal of the NIST PQC competition is to produce PKE schemes which, even if attacked
with a large-scale quantum computer, maintain the security guarantees needed by …

We provide a strong definition for committing authenticated-encryption (cAE), as well as a
framework that encompasses earlier and weaker definitions. The framework attends not only …

A common requirement in practice is to periodically rotate the keys used to encrypt stored
data. Systems used by Amazon and Google do so using a hybrid encryption technique …

End-to-end encryption (E2EE) poses a challenge for automated detection of harmful media,
such as child sexual abuse material and extremist content. The predominant approach at …

MEGA is a leading cloud storage platform with more than 250 million users and 1000
Petabytes of stored data. MEGA claims to offer user-controlled, end-to-end security. This is …