EC Communication on PETs:

• EC: Promoting Data Protection by Privacy Enhancing Technologies (PETs) (press pack), Version May 2, 2007
  
• EC: Communication from the Commission to the European Parliament and the Council on Promoting Data Protection by Privacy Enhancing Technologies (PETs) (COM(2007) 228 final), Version May 2, 2007
  [Other languages]
  
• EC: Privacy Enhancing Technologies (PETs) (Background MEMO/07/159), Version May 2, 2007
  

Selected basic publications:

• Kim Cameron: The Laws of Identity (PDF), Version May 12, 2005
  
• Ann Cavoukian: 7 Laws of Identity – The Law for Privacy-Embedded Laws of Identity in the Digital Age (White Paper) (PDF) and Brochure (PDF), Version October, 2006
  
• Center for Democracy and Technology (CDT): Privacy Principles for Identity in the Digital Age, Version 1.3, July, 2007
  
• David Chaum: Security Without Identification: Transaction Systems to Make Big Brother Obsolete, in: Communications of the ACM, Vol. 28 No. 10, October 1985, 1030-1044
• Sebastian Clauß, Andreas Pfitzmann, Marit Hansen, Els Van Herreweghen: Privacy-Enhancing Identity Management, in: The IPTS Report, Special Issue: Identity and Privacy, September 2002, 8-16
  
• FIDIS D3.1: Structured Overview on Prototypes and Concepts of Identity Management Systems (PDF), V1.1, September 2005, http://www.fidis.net/
  
• FIDIS D3.3: Study on Mobile Identity Management (PDF), V1.0, May 2005, http://www.fidis.net/
  
• Identity Management Systems (IMS): Identification and Comparison Study, conducted in 2003 by Independent Centre for Privacy Protection Schleswig-Holstein, Germany, and Studio Genghini & Associati, Italy, commissioned by Joint Research Centre/Institute for Prospective Technological Studies, Seville (PDF, 15 MB)
  
• Wikipedia: Identity Mashup Links
• ITU Internet Report: digital.life, 2006

Selected White Papers:

• CA White Paper “Identity Federation: Concepts, Use Cases and Industry Standards” (PDF), Version December 2005
  
• Liberty Alliance Project White Paper Liberty ID-WSF People Service – federated social identity (PDF), Version December 5, 2005
  
• Microsoft White Paper The Identity Metasystem: Towards a Privacy-Compliant Solution to the Challenges of Digital Identity (PDF), Version October 25, 2006 (here the version from October 2005
  

Selected blogs:

• Identity 2.0 – The next generation of Identity
• Stefan Brands’ Identity Corner
  
• Kim Cameron’s Identity Weblog
  
• Consult Hyperion’s Digital Identity Forum
  
• Kaliya’s Identity Woman – Saving the World with User-centric Identity
• Dave Kearns’ IdM – A Journal of Identity Management
• On the Identity Trail