S90-18A Free Dumps Study Materials
Question 8: Service A and Service B belong to Organization A and Service C belongs to Organization B. Service A
sends confidential messages to Service B, which forwards these messages to Service
C. The message sent to Service C is intercepted by a load balancing service agent that determines which
instance of Service C to route the message to. This entire message path needs to be encrypted in order
to ensure message confidentiality from when the message is first sent by Service A until it is received by
an instance of Service C. Organization A doesn't trust any intermediaries that may exist in between
Service B and Service C and also doesn't want to share any keys with Organization B. Furthermore, there
is a requirement to minimize any adverse effects on performance. Which of the following approaches
fulfills these requirements?
A. Use message-layer security by adding symmetric encryption between Services A, B and C. This
way,message content is not available to any intermediaries between Services B and C.
B. Because Service A and Service B exist within the same organizational boundary, use transport-layer
security to provide message confidentiality. Use message-layer security via asymmetric encryption
between Service B and Service C.
C. Use transport-layer security between Service B and Service C and use message-layer security via
asymmetric encryptionbetween Service A and Service B. This way. all the services are secured while at
the same time minimizing the performance degradation between Service B and Service C.
D. None of the above.
Correct Answer: B