3xA Security


AAA (3xA) means something that is high-quality, premier, or excellent. In the field of information security, AAA stands for
Authentication, Authorisation and Accounting. 3xA Security combines this and offers high-quality and premier expertise in a number of information security related areas:
  • AAA related standards, technology and protocols
  • Public Key Infrastructure (PKI)
  • Electronic Signatures
  • International Standardisation
  • Security oriented Project Management
  • Pioneer technology Due Diligence and Business Development
  • Technical Patent and IPR Evaluations

Stefan Santesson




Stefan Santesson, independent expert consultant and CISSP, is chairman of the Public Key Infrastructure group (PKIX) in the Internet Engineering Task Force (IETF), member of the IETF Security Area Directorate and manager of 3xA Security. Stefan has 25 years of experience with Information Security, ranging from crypto algorithm development to managing an international security organization. Stefan has been responsible for development of several core standards, in ETSI as well as in the IETF, which influence current implementation of electronic signatures.

During the years 2003-2009 Stefan worked as Senior Program Manager for Microsoft Windows Security where he was responsible for many of Microsoft’s engagements within Internet security protocol development.

A list of Authored Standards is provided in the left column. More specific background information can be found in the CV.