Supply-chain security refers to efforts to enhance the security of the supply chain or value chain, the transport and logistics system for the world's cargo. It combines traditional practices of supply-chain management with the security requirements driven by threats such as terrorism, piracy, and theft. Ensuring the security of cargo while in-transit via the use of locks and tamper-proof seals. Advance notification of the contents to the destination country. Screening and validating of the contents of cargo being shipped. Inspecting cargo on entry.