PPT Slide
C. Adams and S. Lloyd. Understanding the Public-Key Infrastructure. New Riders Publishing, 1999, ISBN 157870166X
T. Austin, D. Huaman and T.W. Austin. Public Key Infra-structure Essentials, John Wiley & Sons, New York, NY, 2000, ISBN 0471353809
S.A. Brands. Rethinking Public Key Infrastructures and Digital Certificates: Building in Privacy. MIT Press, 2000, ISBN 0262024918
R. Housley and T. Polk. Planning for PKI: Best Practices Guide for Deploying Public Key Infrastructure. John Wiley & Sons, New York, NY, 2001, ISBN 0471397024