KRAKEN Secure and privacy preserving platform (broKeRage And marKEt platform for persoNal data) aims to bring personal data sharing and trading at a level of maturity that does not yet exist, by leveraging on: i) the emerging paradigm of self-sovereign identity built upon a stack of distributed ledger technologies (multi-ledger) which ensures future compatibility with different specific blockchain implementations for identity management. It will provide a decentralized user-centric approach on personal data sharing and proving that it can incorporate the trust and security assurance levels deriving claims from national identity schemas (eIDAS-compliant); ii) tested data marketplace technologies which support data sharing as well as aggregated data sharing; iii) A set of different data protection techniques based on advanced crypto tools (P/F/HE, FE, MPC, ABE…) coupled with privacy preserving (AI/ML) analytics, featuring management of privacy / utility trade-offs and metadata privacy. iv) The project will provide market-ready tools and services with industrial strength and suitable privacy metrics that will be conveyed to data subjects with high usability. Taking advantages of the emergent models and lessons learned from previous experiences, including existing and mature cloud-based personal data platforms CREDENTIAL and MHMD, as well as Streamr marketplace services, Kraken proposes an unprecedented approach, which creates an alternative to mainstream paradigms while fully granting the privacy and self-sovereignity of the data subject. KRAKEN enables advanced, convenient data sharing control relying on innovative end-to-end encryption and use of sophisticated proxy cryptography schemes grants data subjects with unprecedented control over their data. Furthermore, this ensures that even the cloud provider (data processor) cannot access the data in plain-text and hence protect access to personal data. KRAKEN involves 10 partners and has a duration of 3 years.

With increasing mobility and Internet usage, the demand for digital services increases and has reached critical and high assurance domains like e-Government, e-Health and e-Business. Those domains have high security and privacy requirements and hence will be harnessed with various novel mechanisms for secure access. Approaches for handling the resulting variety of authentication and authorisation mechanisms include the use of digital identity and access management systems (IAM). Like other technologies IAMs follow the trend of using cloud services. This allows abstracting over used resources and enables ubiquitous access to identity data which is stored and processed in the cloud, but also results in an additional degree of complexity for securely operating IAMs. The goal of CREDENTIAL is to develop, test and showcase innovative cloud based services for storing, managing, and sharing digital identity information and other critical personal data. The security of these services relies on the combination of strong hardware-based multi-factor authentication with end-to-end encryption representing a significant advantage over current password-based authentication schemes. The use of sophisticated proxy cryptography schemes will enable a secure and privacy preserving information sharing network for cloud-based identity information in which even the identity provider cannot access the data in plain-text and hence protect access to identity data. We focus not only on evaluating and applying novel crypto-approaches for IAMs but also on implementing them in an easy-to-use way to motivate secure handling of identity data. In order to also address security, privacy and trust issues related to the used cloud platforms and services we will investigate assurance and resilience approaches for enhancing underlying cloud services. To empirically evaluate our work and to produce outputs of a high technical readiness we will consider use cases from all three domains mentioned above.