APEX is a protocol suite for cross-app sharing of encrypted user data.
Watch our presentation at AsiaCCS '25:
Extended version
for full proofs
Demonstration
Our APEX demo implementation consists of two web applications:
- Cloud Drive: a cloud storage service which lets users keep arbitrary files
- Cloud Notes: a web-based application for taking notes using rich text
Additionally, we have produced an Android app to showcase APEX cross-device flows.
Source code for these are available from our GitHub repo.