Too Long; Didn't Read
Verifiable credentials provide a system for provable electronic facts and documentation through cryptography and public keys. They can be used by supply chains in a stacked way, similar to Russian nesting dolls. US Customs and Border Patrol is better off applying manpower to shipments that are higher-risk, while letting in low-risk items with minimal effort. Just-in-time verifiable credentials take the concept a step further by enabling recipients to monitor credentials over time. Such credentials are in the very early stage, and privacy concerns must be addressed.