From WSE3.0 CTP Release Notes:

"The introduction of Turnkey Security Scenarios that provide high level
security building blocks that enable you to secure messaging patterns (such
as request/response) rather than having to consider how to secure the
request and response independently. These Turnkey Security Scenarios,
otherwise known as security assertions, are best practices when securing end
to end messages."

Can anyone provide a link that explains in details what these Turnkey
Security Scenarios are about?

Thanks in advance.