3.3.5.5 Sending Client Platform Challenge Responses

The client MUST send the Client Platform Challenge Response (section 2.2.2.5) message in response to a Server Platform Challenge (section 2.2.2.4) message. The message type in the licensing preamble is PLATFORM_CHALLENGE_RESPONSE (0x15).

The client constructs a Platform Challenge Response Data (section 2.2.2.5.1) structure and encrypts it (see section 5.1.3) by using the license encryption key. This encrypted Platform Challenge Response Data is sent as the EncryptedChallengeResponse BLOB of the Client Platform Challenge Response message.