Quantum key distribution (QKD) networks promise unconditionally secure key exchange by exploiting quantum mechanical principles. But moving cryptographic keys across a multi-hop quantum network is not straightforward; it introduces routing challenges that have no direct counterpart in classical networks.
The paper, posted on arXiv, presents a survey and taxonomy of existing approaches to this problem, and then outlines a conceptual optimization framework for multi-criteria routing. The abstract highlights that these challenges are unique to QKD networks, suggesting that classical routing solutions cannot be applied without modification.
Because this is the only source provided, the summary is based solely on the abstract. The full paper would presumably detail the taxonomy and framework, but those specifics are not available here.