Uniform Messaging Policy, Level One

The Uniform Messaging Policy (UMP) enables cross-site messaging that avoids Cross-Site-Request-Forgery and similar attacks that abuse HTTP cookies and other credentials. For example, content from customer.example.org can safely specify requests to resources determined by service.example.com. Rather than restricting information retrieval to a single origin, as the Same Origin Policy almost does, the Uniform Messaging Policy supports origin independent messaging.