As digital ecosystems become more connected, attacks increasingly travel through the supply chain rather than the front door. The surge in third-party SaaS usage, affiliate integrations, and open-API ecosystems has expanded the attack surface dramatically. The 2023 casino ransomware attacks exposed weak vendor oversight, outdated access tokens, and insecure update channels. Learn how to map third-party dependencies, embed zero-trust principles, automate vendor access monitoring, and implement contract-level API security expectations.