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Summary of Objectives and Solution Multi-domain diverse path establishment E.g. for end-to-end protection Desire to preserve confidentiality of each domain’s topology information Implies computation performed per domain Downstream PCE cannot return full path info Encode Confidential Path Segment as a Path Key Placed in computation response Signaled in Path message Enquiry sent to PCE when Path Key found in ERO Option for PCE to push Path Key translation to LSRs |