Query: expand on this: To mitigate the vulnerabilities in the DJI Mavic 2 Pro and Pix4D Capture system, this section identifies three critical risks and provides strategies supported by at least two security controls from distinct categories: technical, administrative, and physical. 
At the physical layer, a major vulnerability exists due to the risk of firmware tampering through the USB interface. Attackers can use DJI's DUML protocol to exploit the bootloader. Implementing secure boot mechanisms is a technical control that can be employed to mitigate this vulnerability. These mechanisms verify the integrity of the firmware during startup and prevent unauthorized modifications. This aligns with Yoo's (2013) concept of safeguarding individual protocol layers to prevent compromise at higher levels. Physical controls, such as lockable drone cases, can restrict unauthorized physical access to the USB interface, reducing potential tampering opportunities during storage or transportation. The timely identification and resolution of vulnerabilities can be ensured by administrative controls, such as routine firmware updates and regular security audits. Secure boot mechanisms offer direct protection against this form of tampering; however, they may necessitate a greater degree of implementation complexity (Yoo, 2013).
At the data link layer, encrypted communication protocols like DJI’s proprietary OcuSync are essential but problematic due to their closed-source nature, which limits external validation. Lipps and Schotten (2020) emphasize the importance of encryption, particularly at the physical and data link layers, in preventing risks. In this context, the implementation of WPA3 for WiFi and Bluetooth Low Energy (LE) protocols guarantees the establishment of encryption standards, which mitigates vulnerabilities in unencrypted channels. Additional defenses are provided by administrative controls, such as the requirement of encrypted communication policies, in conjunction with physical measures like signal jamming detection tools. The direct  
security of these vulnerable communication channels is a particularly practical benefit of the implementation of Bluetooth LE and WPA3 (Lipps & Schotten, 2020).
At the application layer, vulnerabilities in HTTP/HTTPS protocols and DJI’s DroneID broadcast represent significant risks. HTTP/HTTPS mixed content vulnerabilities enable man-in-the-middle (MITM) attacks by exploiting unsecured HTTP elements on HTTPS pages (Infosec, n.d.). Strict enforcement of HTTPS policies and the use of content security policies to block mixed content are vital technical controls to mitigate these threats. Furthermore, DJI’s unencrypted DroneID broadcasts expose location data for both the drone and pilot, making them susceptible to interception. Addressing this requires network monitoring solutions to detect unprotected HTTP elements and administrative measures like developer training in secure coding practices (Woodward, 2004). Enforcing HTTPS policies and securing DroneID broadcasts ensures the integrity and confidentiality of transmitted data. conclusion, the mitigation strategies for the DJI Mavic 2 Pro and Pix4D Capture system address vulnerabilities at the physical, data link, and application layers through a mix of technical, administrative, and physical controls. Secure boot mechanisms, WPA3 and Bluetooth LE implementation, and strict HTTPS policies stand out as the most effective measures, offering solutions to the identified risks. 

Subject: computer science
Intent: Literature Understanding