## Diagram: FHE Abstraction Layers ### Overview The image is a diagram illustrating the abstraction layers of a Fully Homomorphic Encryption (FHE) system. It presents a layered structure, resembling a pyramid, with each layer representing a different level of abstraction in the FHE stack. ### Components/Axes The diagram consists of four rectangular blocks stacked vertically, each representing a different layer. The layers are: 1. **FHE Application** (Top, light blue) 2. **FHE Assembly** (Second from top, light yellow) 3. **FHE Functional Units** (Third from top, light blue) 4. **Instruction Set Emulator** (Bottom, light yellow) ### Detailed Analysis The diagram shows a hierarchical structure, with the "Instruction Set Emulator" at the base and the "FHE Application" at the top. The blocks are arranged in descending order of size from bottom to top. * **FHE Application**: The topmost layer, representing the application level that utilizes FHE. * **FHE Assembly**: The layer below the application, likely representing an assembly-level interface for FHE operations. * **FHE Functional Units**: The layer below the assembly, representing the fundamental building blocks for FHE computations. * **Instruction Set Emulator**: The bottom layer, representing the underlying hardware or software that emulates the instruction set required for FHE. ### Key Observations The diagram visually emphasizes the layered architecture of an FHE system, highlighting the different levels of abstraction involved. The size of each block could be interpreted as representing the complexity or scope of each layer, with the Instruction Set Emulator being the most fundamental and the FHE Application being the most abstract. ### Interpretation The diagram illustrates the layered approach to building and using FHE systems. It suggests that FHE applications are built on top of lower-level components, such as FHE assembly and functional units, which in turn rely on an instruction set emulator. This layered architecture allows developers to work at different levels of abstraction, depending on their needs and expertise. The diagram implies that the complexity of FHE is managed through this layered approach, making it more accessible to application developers.