In the course of my bachelor thesis 'Evaluation and Implementation of a secure cloud storage with the Web Cryptography API' this application was implemented to show some basic cryptographic operations in web applications. This case study is a proof-of-concept to securely store, exchange and sign documents in the public cloud. Furthermore, all entities of the user- and identities management are encrypted on a client-side basis, enabling full end-to-end encryption.
You can either use the production build on the Website or the docker image.