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๐Ÿฆ‘ Undercode World!
@UndercodeCommunity


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@Undercode_Testing

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@Undercode_News

3๏ธโƒฃ CVE @Daily_CVE


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๐Ÿฆ‘STM32F417IEH6 chip decryption / SCM decryption / STM32 crack for experts by undercode:

๐Ÿฆ‘ IC chip decryption model:
STM32F405RGT6, STM32F415RGT6, STM32F407VET6, STM32F417VET6
STM32F405OGY6, STM32F415OGY6, STM32F407VGT6, STM32F417VGT6
STM32F405OEY6, STM32F415VGT6, STM32F407ZET6, STM32F417ZET6
STM32F405VGT6, STM32F415ZGT6, STM32F407ZGT6, STM32F417ZGT6
STM32F405ZGT6, STM32F407IET6, STM32F407IGH6, STM32F417IET6
STM32F417IEH6, STM32F417IGT6, STM32F417IGH6 ...

๐Ÿฆ‘ STM32F405 / 415 chip introduction:

1) The STM32F405 / 415 series of MCUs are aimed at medical, industrial and consumer applications that require high integration, high performance, embedded memory and peripherals in packages as small as 4 x 4.2 mm. The STM32F405 / 415 MCU provides the performance of the Cortexยฎ-M4 core (with floating point unit) operating at 168 MHz.

2) STM32F407 / 417 single chip microcomputer introduction:
The STM32F407 / 417 series of MCUs are aimed at medical, industrial, and consumer applications that require high integration, high performance, embedded memory, and peripherals in packages as small as 10 x 10 mm. The STM32F407 / 417 MCU provides the performance of the Cortexยฎ-M4 core (with floating point unit) operating at 168 MHz.


3) In the chip decryption industry, the most accurate decryption method is to take the hardware decryption method, that is, dissolve the chip with a specific fat-dissolving chip to expose its wafers. It is also necessary to have certain skills when operating this step. When performing this step, sometimes, the chip may be dissolved badly, that is, the wire is dissolved, so that the chip is completely useless.

4) When the wafer is exposed, then we will use a high-power microscope and FIB (focused ion beam equipment) to use these two devices to find the encryption position of the chip and change the encryption chip to unencrypted by changing its circuit. State, and then use the programmer to read out the program inside the chip.

@UndercodeTesting
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๐Ÿฆ‘Linux steps to build NFS file sharing server
> BUILD YOUR OWN

1) Linux build NFS server

In order to achieve data sharing in different operating systems, we generally build some servers for file sharing, nfs server is one of them, it realizes the sharing between linux and linux. Today I will share the steps on how to build an nfs server on a Linux system for your reference.

2) Construction steps

1. Install nfs required packages


yum install rpcbind nfs-utils
2. Create test files and grant permissions

mkdir /home/test
chmod -R 777 /home/test/
cd /home/test/
vim aaa/bbb.txt
3. Modify the configuration file

vim /etc/exports
/home/test 192.168.121.0/24(rw)

4) ro
rw
sync
hide
no_hide
all_squash
no_all_squash
root_squash
no_root_squas
4. Open the service

systemctl start rpcbind nfs

echo "192.168.121.38:/home/test /nfs nfs4 defaults 0 0" >> /etc/fstab
mount -av
5. View shared information


showmount -e 192.168.121.38
6. Access to the
Linux side of the NFS server :

mount 192.168.121.38:/home/test/ /mnt/
df

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๐Ÿฆ‘Graphic tutorial to install Cygwin on Windows system to build Swoole test environment
๐Ÿฆ‘Foreword

> Yesterday, the local installation Swooledebugging environment encountered several pits, because my computer is a Windowssystem, it is installed cygwin, but the process is not smooth, installation problems spate terminal, and a step by step to find information pit row, final The installation was also successful. In order to allow others to install successfully at one time and save a lot of trouble and trouble, I wrote this article specifically, hoping to help those in need.

1) Download Swoole

Swoole download address: https://github.com/swoole/swoole-src/releases
2) Open browser download, download location to the slide, can download the zippackage or tar.gzpackage, the download is complete standby waiting behind.
3) Download cygwin

cygwin download address: https://www.cygwin.com/
Open in the browser cygwin's official website, down to the Installing Cygwinsection, click the setup-x86_64.exedownload exefile to

๐Ÿฆ‘Install cygwin

Find just downloaded setup-x86_64.exethe file, double-click it to start the installation cygwin

Step 1: Open the installation interface and click next directly
Step 2: Select the download source, we directly select the default Install from Internet, and then click Next
Step 3: Select the installation directory, can be modified directly in the input box installation directory, or click Browseto select the directory, click Next