1. A method for retrieving computed path segments across one or more domains of a computer network in accordance with a stateless path computation element (PCE) model, the method comprising the steps of: receiving a path reservation message at a node, the path reservation message including one or more private route objects (PROs), wherein each PRO is associated with a different domain; scanning the path reservation message to find a PRO associated with a same domain as the node; extracting, in response to finding the PRO, an encrypted path segment; and decrypting a computed path segment from the encrypted path segment.