A system, method, and software implemented system of services provides enhanced security and management to multiple domain grids and allows intercommunications between the different grid domains providing for secure data exchange, policy exchange, and agent exchange between grids or grid domains. Via the exemplary example, utilizing the unique characteristics of the Service Grid and mobile agents, this is extended to provide enhanced security and management to supply chains: providing data exchange, policy exchange, and agent exchange between supply chain nodes and supply chain partners—facilitating enhanced methods of supply chain automation when using barcodes and Radio Frequency Identity (RFID) tags to identify and track goods through supply chains and consumer uses. Agents transport data and policy between supply-chain partners over an extranet, migrating across corporate boundaries and security domains, locating near where items are identified to provide local control, environmentally responsive policy, and ongoing permanent data capture & history.