SCADA security

I have recently become interested in SCADA (Supervisory Control And Data Acquisition) systems and the security implications within their deployment. My research has yielded the following informational links.

News

how vulnerable are we?
The Information Security Evolution in the Utilities Sector
Digital Bond – SCADA Security Blog

Whitepapers/Presentations

Risks of Cyber Attack to Supervisory Control and Data Acquisition for Water Supply
Electric Power Information Assurance Risk Assessment
Assessment and Remediation of Vulnerabilities in SCADA and Process Control Systems
IT Security for Industrial Control Systems
Safeguarding IEDs, Substations, and SCADA Systems Against Electronic Intrusions
Attack and Defend Tools for Remotely Accessible Control and Protection Equipment in Electric Power Systems
Concerns About Intrusions into Remotely Accessible Substation Controllers and SCADA Systems
Electronic Security of Real-Time Protection and SCADA Communications
Electronic Security Risks Associated With Use Of Wireless, Point-To-Point Communications In The Electric Power Industry
Protecting SCADA and the Vital Energy Infrastructure
SCADA & Control Applications: Security Threats, Vulnerabilities, and Solutions
RTLinux and Process Control Security

Protocols

modbus.org

Open Source

Transparent Modbus/TCP Filtering with Linux
ScadaSafe
Virtual Honeypots For SCADA Networks

Standards / Groups

North American Electric Reliability Council (NERC)
Process Control Security Requirements Forum (PCSRF)
ISA SP-99