Secure Sockets Layer (SSL) Certificates related Links

KPMG White Paper - Low-assurance SSL Certificates as available from some CA's may put e-commerce at risk
Open Source toolkit
Secure Sockets Layer (SSL v2/v3)
Transport Layer Security (TLS v1)
HyperText Transfer Protocol (HTTP), Version 1.1 (Internet Draft) - The application layer protocol Apache+mod_ssl uses over SSL/TLS
Internet X.509 Public Key Infrastructure (PKIX) - The IETF Working Group for PKIX