Physical object identity means a product, label, credential, or asset can be verified as the authorized physical instance. The Verimark Identity Shield turns a visual marker into a controlled verification event, resolving trust through the system, not the image.

Deterministic identity resolution verifies a physical object through controlled system logic, not visual similarity, redirection, or confidence scores. The marker starts the process. The system resolves whether the object is authorized.

Authentication systems typically fall into two categories: deterministic systems that resolve identity with certainty and probabilistic systems that rely on interpretation or behavioral signals. Understanding the difference between these models is critical when evaluating technologies used for product authentication, infrastructure verification, and security-sensitive environments.