A widely used location-tracking system can be intercepted or fooled with fake data, claims a security researcher.
Many firms use Globalstar's satellite-based system to keep an eye on trucks, cars, containers and ships as they move around.
However, said Colby Moore from security firm Synack, the way it passes data around is "fundamentally broken" making it vulnerable to attack.
Globalstar has not yet issued any comment on Mr Moore's findings.
