Chapter 5 · MKD (Memory Key Distribution)
The MKD chapter argues that physical transport of key material on secure storage media can outperform transmission-based methods whenever very large key volumes are needed. It traces the historical background of transported keys, then describes the modern form of MKD using secure SSDs, chip cards, integrated encryption hardware, PIN protection, and certified security components.
The chapter explains the operational process in detail. Key material is created with non-deterministic random number generators, stored securely, and physically transported to the communication partner. Because modern media can hold up to 16 TB, MKD enables practical one-time-pad deployment for telecommunications and especially data storage, something the other methods cannot currently achieve at scale.
At the same time, the method shifts the burden of security. Instead of attenuation, channel noise, or detector attacks, the main risks concern generation procedures, media protection, chain of custody, transport organization, authentication, and operational discipline. The chapter also addresses counterarguments, practical criteria such as cost and robustness, and the role of standards and certification.
- Uses secure storage media for key transport
- Enables very large shared key volumes
- Makes large-scale OTP use realistic
- Relies on secure logistics and chain of custody
- Shifts risk from physics to organization