Links to documentation regarding ADF Security:
Oracle® Application Development Framework Developer's Guide

Links to articles on ADF security:

ADF Security Part 1: Container Managed Security (ADF Code Corner - Frank Nimphius)
ADF Security Part 2: Setup and Authentication (ADF Code Corner - Frank Nimphius)
ADF Security Part 3: Authorization (ADF Code Corner - Frank Nimphius)
ADF Security Part 5: ADF BC Entity Security (ADF Code Corner - Frank Nimphius)

ADF Security 11g and ADF Business Components (Andrejus Baranovski)

Practical ADF Security Deployment on WebLogic Server (Andrejus Baranovski)

Simplified ADF 11g Application Credential and Policy Migration to Standalone WebLogic Servers (Steve Muench)

Propagating ADF Authentication Identity into the ADF BC layer in ADF 11g (Duncan Mills)

Configuring a JDev 11g ADF Security app on standalone WLS against MS Active (Chris Muir)

ADF security in your project (Edwin Biemond)

Using database tables as authentication provider in WebLogic (Edwin Biemond)

ADF Security 11g and ADF Business Components (Andrejus Baranovskis)