Roger Clarke's 'W(h)ither PKI?'

W(h)ither PKI?

Roger Clarke

Principal, Xamax Consultancy Pty Ltd, Canberra

Visiting Fellow, Department of Computer Science, Australian National University

Presentation to the China Information Technology and Law Centre, Departments of Law and CSIS, University of Hong Kong, 25 September 2002

Version of 25 September 2002

© Xamax Consultancy Pty Ltd, 2002

This document is at


The use of digital signatures is often thought to depend on Public Key Infrastructure (PKI). Conventional PKI, built around X.509 certificates and 'certificate authorities' (CAs), has been a substantial failure, and will continue to be so. This presentation explains why.

The presentation is based on Clarke (2001).

Here are the PowerPoint slides.


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Created: 25 September 2002

Last Amended: 25 September 2002

These community service pages are a joint offering of the Australian National University (which provides the infrastructure), and Roger Clarke (who provides the content).
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