High success rate and high difficulty IC unlock

cpld IC unlock

CPLD IC unlock, also known as CPLD MCU crack,. With the help of special equipment or self-made equipment, single-chip attackers can extract key information from the chip by using a variety of technical means, which is called CPLD chip decryption.

CPLD(Complex Programmable Logic Device)is the Complex PLDinclude, the PLDfor the logical., the user is the default logic, and the construction logic and the data IC.The targetfile, the downloading("in system".)is code.to targetments, the data system.
CPLD can classed the loading.in the application in the DSP, MCU, AVR, ARM, and is the default components to the processing process to the the application and the designing the valuecode of the., the classions to the the the the the application of the the application. Structure classification and decryption technology
1. logic unit array (LCA), including logic fast, interconnect array and I/O block.
2. composite CPLD structure, including logic block and interconnect matrix switch
CPLD has the characteristics of flexible programming, high integration, short design and development cycle, wide application range, advanced development tools, low design and manufacturing costs, low requirements for Designers'hardware experience, no testing of standard products, strong confidentiality, price popularization and so on. It can be widely used in large-scale circuit design. Product prototyping and product production (usually under 10000 parts).
Almost all applications of small and medium scale general digital IC can be applied to CPLD devices. CPLD devices have become an indispensable part of electronic products, and its design and application become a necessary skill for electronic engineers.
In theory, any CPLD chip, attackers can use sufficient investment and time to use the above methods to break, which is the basic principle that system designers should always keep in mind. Therefore, as a design engineer of electronic products, it is very necessary to understand the latest technology of CPLD single-chip attack, so as to know one's own knowledge and know one's own.
The first step in decrypting intrusive CPLD chips is to uncover the chip package (sometimes called "open" or "decapsulation" in English). There are two ways to do this: the first is to completely dissolve the chip package and expose the metal wiring. The second is to remove the plastic package on the silicon core only.
The plastic on the chip can be uncovered with a knife, and the epoxy resin around the chip can be corroded by concentrated nitric acid. Hot concentrated nitric acid will dissolve the chip package without affecting the chip and wiring. This process is generally carried out under very dry conditions, as the presence of water may erode the exposed aluminum wire connections (which may cause decryption failure).
Then, in the ultrasonic tank, acetone was used to clean the CPLD MCU to remove the residual nitric acid and soak it.
The last step is to find the location of the fuse and expose the protective fuse to ultraviolet light. A microscope with a magnification of at least 100 times is usually used to track in the wire of the programmed voltage input pin in search of a protective fuse. Without a microscope, a simple search is performed by exposing different parts of the chip to ultraviolet light and observing the results. Opaque sheets are used to cover the chip during operation to protect program memory from ultraviolet light. Exposure of the protective fuse to ultraviolet light for 5 to 10 minutes can destroy the protective effect of the protective bit, and then the contents of the program memory can be read out directly with a simple programmer.