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Deep packet inspection technology became a cornerstone of Internet censorship by facilitating cheap and effective filtering of what censors consider undesired information. Moreover, filtering is not limited to simple pattern matching but makes use of sophisticated techniques such as active probing and protocol classification to block access to popular(More)
This paper discusses the approach taken within the PrimeLife project for providing user-friendly privacy policy interfaces for the PrimeLife Policy Language (PPL). We present the requirements, design process and usability testing of the " Send Data? " prototype, a browser extension designed and developed to deal with the powerful features provided by PPL.(More)
We present a transparency-enhancing tool in the form of a cryptographic scheme that enables data processors to inform users about the actual data processing that takes place on their personal data. Our proposed solution can handle arbitrary processes while offloading storage and interactions with users to dedicated log servers. On top of strong integrity(More)
This paper discusses the approach taken within the PrimeLife project for providing user-friendly privacy policy interfaces for the PrimeLife Policy Language (PPL). We present the requirements, design process and usability testing of the " Send Data? " prototype, a browser extension designed and developed to deal with the powerful features provided by PPL.(More)
We present Balloon, a forward-secure append-only persistent authenticated data structure. Balloon is designed for an initially trusted author that generates events to be stored in a data structure (the Balloon) kept by an untrusted server, and clients that query this server for events intended for them based on keys and snapshots. The data structure is(More)
The Data Track is a transparency-enhancing tool that aims to educate users by providing them with an overview of all their data disclosures. In this paper, we describe a cryptographic scheme for storing all data disclosures tracked by the Data Track centrally in the cloud in a privacy-friendly way. Our scheme allows users to store their data anonymously,(More)
Transparency is a basic privacy principle and factor of social trust. However, the processing of personal data along a cloud chain is often rather in-transparent to the data subjects concerned. Transparency Enhancing Tools (TETs) can help users in deciding on, tracking and controlling their data in the cloud. However, TETs for enhancing privacy also have to(More)