Service A retrieves data from third-party services that reside outside the organizational boundary. The quality of the data provided by these third-party services is not guaranteed. Service A contains exception shielding logic that checks all outgoing messages. It is discovered that service consumers are still sometimes receiving malicious content from Service A. Because digital signatures are being used, it is confirmed that Service A is, in fact, the sender of these messages and that the messages are not being altered by any intermediaries. Why do messages from Service A continue to contain malicious content?

Service A accesses a legacy system. There is a requirement to secure Service A so that it can only be accessed by authorized service consumers. The current service architecture doesn't allow the delegation of service consumer credentials to the legacy system. Which pattern needs to be applied in order to fulfill this security requirement?

A service composition is made up of services from a particular domain service inventory. All of the services belonging to the domain service inventory are deployed on the same server. Service A is part of the same domain inventory but is not part of this service composition. Service A becomes a victim of an XML parser attack resulting in its unavailability. However, because the services in the service composition rely on the same XML parser used by Service A. the service composition can also be affected by this attack.