ImmunityOne is a shared immunization technology SaaS system independently developed by CICA. Multi-tenant management is carried out through the Cloud Native (Cloud Native) platform, and the collected high-fidelity data is centrally stored to form a security data lake. Threat analysis experts carry out threat hunting based on security incident clues, refine threat intelligence, and share it with all customers throughout the network to achieve a “one-place detection, network-wide immunity” security defense system for advanced threats.