I am working in the PrimeLife project funded by the Seventh Research Framework (i.e., the European Union). This project aims at providing significant improvements when it comes to digital privacy of people. PrimeLife is the successor project of the PRIME project, which ended in 2008.
One main focus of PrimeLife are digital social networks (such as Facebook or LinkedIn). When addressing questions such as ''How can a user get (back) control over her data and how it is released?'', we also consider the whole life of a person. By doing so we also have to look at the question of delegating control, for example, for usage after a person's death. My main interests within the project are the cryptographic mechanisms, the integration of the privacy technologies into open source initiatives and the design of the user interfaces. The latter being very important as the user acceptance heavily depends on the usability of a solution.

2011

• P. Bichsel, J. Camenisch, and F-S. Preiss.
  A Comprehensive Framework Enabling Data-Minimizing Authentication.
  7th ACM Workshop on Digital Identity Management (ACM DIM '11), Chicago, IL, USA, October 21, 2011.
  PDF | BibTeX | DOI | Slides (by P.B.)
• P. Bichsel, and F-S. Preiss.
  DEMO: A Comprehensive Framework Enabling Data-Minimizing Authentication.
  Demonstration at the 18th ACM CCS '11, Chicago, IL, USA, October 17-21, 2011.
  PDF | BibTeX
• P. Bichsel, J. Camenisch, and M. Verdicchio.
  Recognizing Your Digital Friends.
  First International Workshop on Security and Privacy in Social Networks (SPSN '11), Boston, MS, USA, October 9-11, 2011.
  PDF | BibTeX | DOI | Slides (by M.V.)
• P. Bichsel, D. Ragget, and R. Wenning.
  Position paper: Web authentication is deeply flawed - it's time to fix it.
  W3C Workshop on Identity in the Browser, Mountain View, USA, May 24-25, 2011.
  Paper | BibTeX
• P. Bichsel, J. Camenisch, T. Groß, and V. Shoup.
  Anonymous Credentials on Java Card.
  21st Fraunhofer SIT-Smartcard Workshop 2011, Darmstadt, Germany, February 2-3, 2011.
  PDF | BibTeX | Slides (by T.G.)

2010

• P. Bichsel and J. Camenisch.
  Mixing Identities with Ease.
  IFIP Working Conference on Policies & Research in Identity Management (IDMAN '10), Oslo, Norway, November 18-19, 2010.
  PDF | BibTeX | DOI | Slides (by P.B.)
• P. Bichsel, J. Camenisch, G. Neven, N.P. Smart and B. Warinschi.
  Get Shorty via Group Signatures without Encryption.
  7th Conference on Security and Cryptography for Networks (SCN '10), Amalfi, Italy, September 13-15, 2010.
  PDF | BibTeX | DOI | DBLP | Slides (by P.B.)

2009

• P. Bichsel, J. Camenisch, T. Groß and V. Shoup.
  Anonymous Credentials on a Standard Java Card.
  16th ACM Conference on Computer and Communications Security (ACM CCS '09), Chicago, IL, USA, November 9-13, 2009.
  PDF | BibTeX | DOI | DBLP | Slides (by T.G.)
• P. Bichsel, S. Müller, F.-S. Preiss, D. Sommer and M. Verdicchio.
  Security and Trust through Electronic Social Network-based Interactions.
  Workshop on Security and Privacy in Online Social Networking (SPOSN '09), Vancouver, BC, Canada, August 29-31, 2009.
  PDF | BibTeX | DOI | DBLP | Slides (by M.V. and P.B.)

• IBM/Identity Mixer.
  European Identity Award 2010 in the category Best Innovation
  Prize winners | Press Release | Technology Overview...
• P. Bichsel, and others.
  Certificate of Appreciation for the 2009 Outstanding Technical Accomplishment: Privacy-Enhancing Identity Management
  IBM Research Award | Technology Overview... | Getting Started...
• P. Bichsel, J. Camenisch, T. Groß.
  IBM Significant External Honor
  IBM Award | Technology Overview... | Getting Started...
• P. Bichsel, J. Camenisch, T. Groß and V. Shoup.
  Innovation Award 2009 of the Gesellschaft für Informatik (GI)
  Prize winners | Press Release | Interview (October 19, 2009) | Technology Overview...

• P. Bichsel.
  Invited Talk: Building Privacy into the Future Internet
  Workshop on Future Internet Security (FIS 2011), Seoul, Korea, August 31, 2011.
• P. Bichsel, L. Fritsch, A. Jøsang, M. Volkamer.
  Panel: Challenges in Identity Management.
  IFIP Working Conference on Policies & Research in Identity Management (IDMAN '10), Oslo, Norway, November 18-19, 2010.

• Security Team, IBM Research (correspondance to Jan Camenisch).
  Specification of the Identity Mixer Cryptographic Library (a.k.a. Cryptographic Protocols of the Identity Mixer Library)
  PDF | BibTeX | Link | Questions
• P. Bichsel, J. Camenisch, F-S. Preiss, D. Sommer.
  Dynamically-changing Interface for Interactive Selection of Information Cards Satisfying Policy Requirements
  PDF | Link | Questions
• P. Bichsel, C. Binding, J. Camenisch, T. Groß, T. Heydt-Benjamin, D. Sommer, and G. Zaverucha (Contributors).
  Cryptographic Protocols of the Identity Mixer Library
  PDF | Link | Questions

I began my studies in electrical engineering and information technology in 2002 at ETH Zürich and finished by getting the M.Sc. degree in November 2007. The focus of my studies was on communication networks and their security aspects as well as security of operating systems in general. It was an honor to get the possibility to write the master thesis at the IBM Research Laboratory in Rüschlikon under the supervision of Jan Camenisch and with the guidance of Dieter Sommer and Thomas Groß. The subject of the thesis was the analysis and implementation of theft and misuse protection mechanisms for anonymous credentials. The underlying anonymous credential system has been introduced by Camenisch et al. and is a means for privacy friendly and secure exchange of information. The privacy enhancement lies mainly in the minimisation of information that needs to be revealed to the communication partner. This is achieved by enabling selective disclosure of attributes and proofs (e.g., the Swiss government certifies that I am older than 18) about attributes. More on anonymous credential systems can be found on our IDMX blog or the cryptographic library can be downloaded from http://prime.inf.tu-dresden.de/idemix/.
The library used for the implementation was the Idemix library designed and largely implemented by Dieter Sommer. As a result of the thesis, different mechanisms for theft prevention and protection could be added. The current version of the Idemix library is available at http://prime.inf.tu-dresden.de/idemix/. It does include many features such as pseudonyms (for pseudonymous access to web sites), updateable credentials, or verifiable encryption. The theft prevention features will be added after a review of the code. In addition to the code, we provide a tutorial on how to get it running.
Due to the challenging work and the great atmosphere fostering collaboration and innovation, I applied for a research position and became a part of the security group in March 2008.