NIST hosted the first annual Public Key Infrastructure (PKI) Research Workshop on April 24-25, 2002. The two-day event brought together PKI experts from academia, industry, and government to explore the remaining challenges in deploying public key authentication and authorization, and to develop a research agenda to address those outstanding issues.The workshop consisted of the presentation of 14 referred papers, four panel discussions, and a work-in-progress session. About 100 participants from the United States, United Kingdom, Canada, Spain, Sweden, Ireland, Taiwan, and South Korea made the workshop an international event. Based on participant feedback, the workshop provided the most up-to-date information on PKI research and deployment. This proceedings includes the refereed papers, and captures the essence of the panels and interaction at the workshop.