Cybersecurity is a paramount concern for fleets worldwide. An increase in malicious actors targeting trucks has heightened worries about the dependability of the widely used security protocol known as seed-key exchange. This method is employed in truck diagnostic systems to initiate a privileged diagnostic session. The client, which could be diagnostic software or an attacker, first requests a 'seed' and must then provide a corresponding 'key' to successfully establish the session. Seed-key exchange is typically used to regulate access to a truck's Electronic Control Unit (ECU). The ECU is 'unlocked' to permit elevated privilege operations, some of which can have cyberphysical consequences. However, at its fundamental level, seed-key exchange is straightforward and leaves trucks susceptible to attacks. Attackers can bypass the protocol in several ways. One method involves reverse-engineering the algorithm. When malicious actors succeed in reverse-engineering the seed-key algorithm, they usually begin by examining the diagnostic software executables or the ECU firmware. Once they gain this initial access, it is not overly difficult for a determined attacker to reverse-engineer the seed-key exchange routine. Furthermore, the protocol's inherent simplicity allows hackers to extract or emulate the routine without needing to fully comprehend it. This capability to access vehicle networks by simply reusing an identified routine within the software or firmware can often be more accessible than complex reverse-engineering. Another vulnerability lies in replaying a key. Seed-key exchange relies on...