To address security issues as they relate to the OPC interfaces including data access and historical. If possible, strong user involvement in defining the requirements is particularly desirable to this effort.

To determine if an existing design (e.g. the enhanced N.T. 5 security model with user definable attributes) could serve as a base for this effort (e.g. simply come up with an OPC application note for applying NT 5 security in a uniform way) or if a new set of OPC specific COM Interfaces are a better solution.

If new interfaces are required then this effort should attempt to avoid changes to existing OPC Interfaces and should instead attempt to define additional new security related interfaces on existing OPC objects.

Keep in mind the performace aspects of your decisions.

As always, produce working sample code to prove the design and provide an Automation wrapper if needed.

It is believed that this effort should be fairly straight forward and that a specification can be produced in less than one year.