Core Processes of Printer Chip Reverse Engineering---Image Stitching and Circuit Extraction

Core Processes of Printer Chip Reverse Engineering---Image Stitching and Circuit Extraction

Toner chip reverse engineering is a technology that strips the chip materials layer by layer through chemical methods and analyzes the internal structure of the chip using a scanning electron microscope (SEM). 

Attackers can infer the chip's functions and design code by extracting the circuit layout and gate - level netlist. This method is usually used to crack the design logic of the chip.

It is essentially a technology that reverse - deduces the printer chip design logic through physical deconstruction + micro - analysis, with a dual nature of “technical research” and “security risks”. 

This series article will help you understand this technology more comprehensively from four dimensions: core processes, key objectives, application scenarios (legal vs illegal), and protection methods:

Core Processes of Printer Chip Reverse Engineering (from “disassembly” to “deduction”)

The “chemical stripping + SEM analysis” is the core step of physical deconstruction, but a complete reverse requires the cooperation of multiple links. It can be divided into 5 steps specifically:

Image Stitching and Circuit Extraction

Align and stitch the micro - images of each layer according to the coordinates to restore the complete “3D circuit structure”;

Then, through image recognition algorithms (or with manual assistance), extract key circuit units, such as transistors, resistors, capacitors, and the connection relationships between them (i.e., the “circuit layout diagram”).

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