While a wide variety of starship manufacturers and enthusiasts build and speculate on the enigmatic Zipp Drives, only certified technicians are capable of correctly calibrating them for accurate and reliable use. To protect this knowledge, CZTs are required to keep a cognitive implant that not only keeps the data encrypted against tweaking, but also inhibits any behavior that would disclose the information such as reciting it, writing it down, or confessing it under extreme duress.