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L2TPv3 Control Connection and Message Authentication
Provides simple peer authentication and control message authentication and integrity checking
Challenge renamed to “Nonce” and Response renamed to “Message Digest”
SHA-MD5 hash covers the nonce received from the peer, the shared-secret, and the header and body (rather than just the message type) of the control message being sent
Nonce may be reset in any message, Message Digest present in all messages
PPT Version