| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve the problem that graphical characteristics of 3D graphical objects encrypted using format-preserving encryption make rendering of such objects quite inefficient by non-authorized devices.SOLUTION: In order to optimize rendering of a 3D graphical object represented by a list of points and a list of surfaces defined by points in the list of points, a device receives the graphical object, encrypts the graphical object using a format-preserving encryption method to obtain an encrypted graphical object, encapsulates the encrypted graphical object to obtain an encapsulated graphical object by adding at least one encapsulation by adding, for each encapsulation, a plurality of surfaces that together enclose the encrypted graphical object, to the list of surfaces, and outputs the encapsulated graphical object.</p> |
