Part 48 Controlling WCF message protection using ProtectionLevel parameter

In this video we will discuss how to control the WCF message protection using ProtectionLevel parameter.

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The following 6 attributes has the ProtectionLevel named parameter, which implies that ProtectionLevel can be specified using any of the below 6 attributes. They are specified in the order of precedence. For example ProtectionLevel specified at an operation contract level overrides the ProtectionLevel specified at the service contract level.
ServiceContractAttribute
OperationContractAttribute
FaultContractAttribute
MessageContractAttribute
MessageHeaderAttribute
MessageBodyMemberAttribute

ProtectionLevel specified on the ServiceContract will be applicable for all the operation contracts within that service contract. ProtectionLevel specified on the OperationContract will be applicable for just that OperationContract. If we specify ProtectionLevel on a MessageContract, then that protection level will be applicable for all messages of that MessageContract type.

When we use wsHttpBinding, by default the messages are encrypted and signed. Encryption provides confidentiality and signing provides integrity. To customize the level of message protection use ProtectionLevel parameter.

Please Note: ProtectionLevel enum is present in System.Net.Security namespace.

ProtectionLevel enum has the following values
None - No protection. Message is not signed and not encrypted. Provides only authentication.
Sign - No encryption but is digitally signed to ensure the integrity of the message
EncryptAndSign - Message is encrypted and then signed to ensure confidentiality and integrity of the message

Let's understand using ProtectionLevel parameter with an example.

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