<http://schema.org/description>
"If you&amp;#x27;re using the Windows Azure Access Control Service (or any other STS for that matter) this is an issue you might encounter when your Web Role has more than one instance:   [CryptographicException: Key not valid for use in specified..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://fabriccontroller.net/key-not-valid-for-use-in-specified-state-exception-when-working-with-the-access-control-service/>