Title

Fingerprint Recognition on Mobile Devices: Widely Deployed, Rarely Understood

Authors

Farzaneh Karegar, John Sören Pettersson and Simone Fischer-Hübner

Abstract

Only a few studies have addressed the users’ conception of how fingerprint recognition used for different purposes on mobile devices works.

Title

Protean Signature Schemes

Authors

Stephan Krenn (AIT), Henrich C. Pöhls (UNI PASSAU), Kai Samelin (IBM Research Zurich), Daniel Slamanig (AIT)

Abstract

We introduce the notion of Protean Signature schemes. This novel type of signature scheme allows to remove and edit signer-chosen parts of signed messages by a semi-trusted third party simultaneously.

Title

Bloom Filter Encryption and Applications to Efficient Forward-Secret 0-RTT Key Exchange

Authors

David Derler, Tibor Jager, Daniel Slamanig, Christoph Striecks

Abstract

Forward secrecy is considered an essential design goal of modern key establishment (KE) protocols, such as TLS 1.3, for example.

Title

Secure and Privacy-Friendly Storage and Data Processing in the Cloud

Authors

Pasquale Chiaro (ICERT) , Simone Fischer-Hübner (KAU), Thomas Groß (University of Newcastle upon Tyne), Stephan Krenn (AIT), Thomas Lorünser (AIT), Ana Isabel Martı́nez Garcı́a (ETRA Investigacion y Desarrollo), Andrea Migliavacca (LISPA), Kai Rannenberg (GUF), Daniel Slamanig (AIT), Christoph Striecks (AIT), and Alberto Zanini (LISPA)

Abstract

At the IFIP Summer School 2017, the two H2020 projects CREDENTIAL and PRISMACLOUD co-organized a workshop dedicated to introducing the necessary background knowledge and demonstrating prototypes of privacy-preserving solutions for storing, sharing, and processing potentially sensitive data in untrusted cloud environments.

Title

Revisiting Proxy Re-Encryption: Forward Secrecy, Improved Security, and Applications

Authors

David Derler (TUG), Stephan Krenn (AIT), Thomas Lorünser (AIT), Sebastian Ramacher (TUG), Daniel Slamanig (AIT), Christoph Striecks (AIT)

Abstract

We revisit the notion of proxy re-encryption (PRE), an enhanced public-key encryption primitive envisioned by Blaze et al.

Title

Helping Johnny to Make Informed Decisions in the Context of Social Login

Authors

Farzaneh Karegar, Nina Gerber, Melanie Volkamer, Simone Fischer-Hübner

Abstract

Users have to make two privacy-related decisions when signing up for a new web service: (1) whether to use an existing Single Sign-On (SSO) account of an Identity Provider (IdP) and (2) what information the IdP is allowed to share and for how long with the Service Provider (SP).

Title

Towards Attribute-Based Credentials in the Cloud

Authors

Stephan Krenn (AIT), Thomas Lorünser (AIT), Anja Salzer (AIT), and Christoph Striecks (AIT)

Abstract

Attribute-based credentials (ABCs, sometimes also anonymous credentials) are a core cryptographic building block of privacy-friendly authentication systems, allowing users to obtain credentials on attributes and prove possession of these credentials in an unlinkable fashion.

Title

Towards the Adoption of Secure Cloud Identity Services

Authors

Alexandros Kostopoulos (OTE), Evangelos Sfakianakis (OTE), Ioannis Chochliouros (OTE), John Sören Pettersson (KAU), Stephan Krenn (AIT), Welderufael Tesfay (GUF), Andrea Migliavacca (LISPA), and Felix Hörandner (TUG)

Abstract

Enhancing trust among service providers and end-users with respect to data protection is an urgent matter in the growing information society.