3D-Printed ROM

Original (Chinese)

A write-once, read-many times (WORM) memory medium fabricated using 3D printing, additive manufacturing, or similar automated techniques is disclosed. The memory is structured as a diode matrix in which memory states are stored physically at intersections of address and data lines. These intersections are created using materials with differing electrical properties to produce fixed high or low states. The fabrication system may use arrays of ejection nozzles or other deposition mechanisms to enable practical write speeds. Applications include secure storage of cryptographic keys, hash values, and identity credentials. Additional embodiments include secure computing systems, secure communication devices, and hardware-based authentication mechanisms using the fabricated WORM memory as a tamper-resistant medium.