Secure streaming method in a numerically controlled manufacturing system and a secure numerically controlled manufacturing system

摘要

Secure streaming method in a numerically controlled manufacturing system where the 3D file of the 3D object such as a CAD file or STL file is not sent to the manufacturing machine but is kept in asecured system. Instead only the instructions for controlling the manufacturing machine (e.g. so called G codes) are streamed to the manufacturing machine. Such instructions are secured so that only a specific manufacturing machine can make use of them. To this end the set of instructions may be encoded e.g. hashed on a secure server using a server hash table while the manufacturing machine is provided with a local lookup hash table that is synchronized e.g. loosely synchronized with the server s hash table for converting the hashed instructions back to instructions suitable for operating the manufacturing machine.