Opportunistic QKD: Exploiting Idle Capacity of Classical WDM Systems

This project represents an academic approach to a critical bottleneck in quantum networking: the cost of dedicated fiber. By proposing an 'opportunistic' model, it leverages existing classical infrastructure. The project currently has 0 stars and 4 forks, which typically indicates a research group's internal repository or a very recent paper submission (the arXiv ID suggests a future-dated or extremely recent entry). The defensibility is low from a software perspective as it is a theoretical framework/simulation; the real 'moat' in this space is held by hardware manufacturers (like ID Quantique or Toshiba) and telecommunications giants (Ciena, Cisco) who control the physical optical layer. Frontier AI labs (OpenAI/Anthropic) are unlikely to compete here as it is a physical layer networking problem. However, cloud providers with massive dark fiber investments (Google/AWS) could eventually implement these algorithms in their proprietary optical switching logic. The primary risk is that this becomes an industry standard rather than a defensible product, making it a 'commodity' protocol for future quantum-safe networks.