Techniques to process three-dimensional object files while maintaining privacy

A system for processing a three-dimensional (3D) object file in a privacy-preserving manner, comprising:

• a memory;
• a processing device operatively coupled to the memory, the processing device to:
• obtain an object file that comprises a specification of a 3D printable object;
• encrypt the object file using a public key to generate an encrypted object file;
• send, to a remote computing system, the encrypted object file and a request to process the encrypted object file to identify a characteristic of the 3D printable object;
• receive an encrypted result file from the remote computing system, wherein the encrypted result file comprises an encrypted Minkowski sum of the encrypted object file and an encrypted comparison file;
• decrypt the encrypted result file using a private key corresponding with the public key to generate an unencrypted result file;
• and
• process the unencrypted result file to determine the characteristic of the 3D printable object.

A non-transitory computer-readable storage medium having instructions stored thereon that, when executed by a processing device, cause the processing device to:

• obtain an object file that comprises a specification of a 3D printable object;
• encrypt the object file using a public key to generate an encrypted object file;
• send, by the processing device to a remote computing system, the encrypted object file and a request to process the encrypted object file to identify a characteristic of the 3D printable object;
• receive an encrypted result file from the remote computing system, wherein the encrypted result file comprises an encrypted Minkowski sum of the encrypted object file and an encrypted comparison file;
• decrypt the encrypted result file using a private key corresponding with the public key to generate an unencrypted result file;
• and
• process the unencrypted result file to determine the characteristic of the 3D printable object.