A method and system of securing cargo for preventing access to cargo during transportation is disclosed. In an embodiment, the system comprises a security net adapted for covering the cargo, the net comprising a panel with a periphery. The panel is made from a net with holes of sufficiently small size to prevent objects from readily being inserted therethrough without causing a tear thereto. The periphery contains a plurality of openings. The system also comprises a plurality of security locks adapted for locking onto a pallet beneath the cargo and coupling onto one of the plurality of openings. Each security lock has a first identifier for identifying whether the plurality of security locks belong to a predetermined set.