Abstract: Provided are a three-dimensional (3D) data generation device, an analysis server, and a 3D printing method employing a homomorphic encryption scheme. The 3D data generation device includes a memory, a scan module, and a processor connected to the memory and the scan module. The processor generates 3D data of an object scanned through the scan module and encrypts the 3D data in accordance with a homomorphic encryption scheme.

Abstract: Disclosed herein is a program conversion apparatus, which converts a first program to which homomorphic encryption is not applied into a second program to which the homomorphic encryption is applied, including a memory, which stores a first library for configuring the first program and a second library for configuring the second program, and a processor configured to convert the first program into the second program through conversion between operations provided by the first and second libraries.

Abstract: A retracting and dissecting apparatus designed to allow easy and safe retraction during a surgical operation. The apparatus comprises first and second dissecting members provided at one end thereof with grips, at the other end thereof with first and second plate-shaped dissecting portions, and at the center thereof with fastening holes, respectively, a fastening member to join the fastening holes of the first and second dissecting members to each other such that the first and second dissecting members can rotate in a predetermined range, and a position holding member between the center of the first and second dissecting members and the grips of the first and second dissecting members to hold the first and second dissecting members. The dissecting portions have plate shapes, preventing the dissected portion of the patient from being damaged, and ensuring a more safe dissection.