Secure and Resilient Data Replication for the Client-centric DecentralizedWeb

Part of the web is shifting to a client-centric, decentralized model where web clients become the leading execution environment for application logic and data storage. However, the basic paradigm of the web and the browser is still server-centric. The key data is stored, served, processed and analyzed on central servers owned by the service provider. This means that a good internet connection is required, otherwise the application will be slow, or even unreachable when there is no internet. Furthermore, user data can be stolen, modified, deleted or sold by the service provider itself, or by an external attacker targeting the service provider. We propose three middleware solutions for a client-centric web paradigm where clients also become authoritative copies of the data. Data can be replicated peer-to-peer between many clients and servers. This kind of distributed and decentralized web application architecture should be supported by both the browser and clientside web middleware. The middlewares differ in their consistency and trust model.