In the supply chain, thieves may use a variety of methods to steal items in transit without being detected. Here are some common methods: 1. **Inside Collusion**: Thieves may collude with insiders in the supply chain (such as employees or carriers) to use their familiarity with the transportation process to steal. 2. **Disguise**: Thieves may pretend to be legitimate shipping companies or personnel in the transportation process in order to gain access and steal items. 3. **Fake Goods**: Using false bills of lading or shipping documents to deceive shipping companies or warehouses into thinking certain goods are legitimate and thus illegally obtain them. 4. **Surveillance and Information Gathering**: Thieves may conduct surveillance and reconnaissance in advance to understand transportation routes, times, and security measures in order to choose the best time to steal. 5. **Use of Alternative Vehicles**: Thieves may use vehicles similar to transportation vehicles to reduce the risk of being identified. 6. **Disruptions and Diversions**: Creating disruptions (such as deliberately causing accidents or emergencies) to distract security personnel or staff so that they can steal. 7. **Technical means**: Use technical equipment (such as signal jammers, GPS trackers, etc.) to monitor or interfere with the transportation process in order to steal. 8. **Real-time data hacking**: By hacking into the transportation management system, stealing information about the transportation process and even tampering with the cargo information. 9. **Exploiting loopholes**: Attacks against loopholes in the logistics system, such as unlocked containers or unreinforced warehouses during transportation. To reduce the risk of theft in the supply chain, companies can take measures such as strengthening security measures, implementing stricter identity authentication, raising employees' security awareness, and using technical means for real-time monitoring.