A brief discussion on using Cython to encrypt Python to protect our code

Article directory

  • Preface
  • 1. Introduction to Cython
  • 2. Use Cython to encrypt Python code
    • 1. Install Cython
    • 2. Create Cython module
    • 3. Create setup.py file
    • 4. Compile and build modules
    • 5. Encrypt Python code
    • 6. Run the code
  • Summarize
      • About Python technical reserves
        • 1. Learning routes in all directions of Python
        • 2. Python basic learning video
        • 3. Excellent Python learning books
      • 4. Python toolkit + project source code collection
        • ①Python toolkit
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        • 5. Interview materials
      • 6. Python part-time channels

Foreword

In the field of computer science, encryption is an important technology for protecting information security. As a high-level programming language, Python’s interpreter source code is open source, which means that anyone can access and modify the implementation details of the Python interpreter. Therefore, if we need to protect our Python code from illegal access or modification, we need a way to encrypt our Python code.

A common approach is to use Cython, which converts Python code into C code and then compiles it into native extension modules. Since C code is a compiled binary, it is difficult to decompile and modify. Therefore, using Cython can effectively encrypt and protect our Python code.

1. Introduction to Cython

  • In the field of computer science, encryption is an important technology for protecting information security.

  • As a high-level programming language, Python’s interpreter source code is open source, which means that anyone can access and modify the implementation details of the Python interpreter.

  • Therefore, if we need to protect our Python code from illegal access or modification, we need a way to encrypt our Python code.

  • A common approach is to use Cython, which converts Python code into C code and then compiles it into native extension modules.

  • Since C code is a compiled binary, it is difficult to decompile and modify.

  • Therefore, using Cython can effectively encrypt and protect our Python code.

2. Use Cython to encrypt Python code

Here are the steps to encrypt Python code using Cython:

1. Install Cython

First, we need to install the Cython extension. Cython can be installed using the following command:

pip install Cython

2. Create Cython module

Create a Cython module to save the Python code as a .pyx file. For example, we create a file called encrypt.pyx and write the following code:

def encrypt(text, key):
    encrypted_text = ""
    for char in text:
        encrypted_text + = chr(ord(char) + key)
    return encrypted_text

The above code demonstrates a simple encryption function that adds the ASCII value of each character of the input text to the key and returns the encrypted text.

3. Create setup.py file

rom distutils.core import setup
from Cython.Build import cythonize

setup(ext_modules=cythonize("encrypt.pyx"))

The above code defines a Python extension module that we will use Cython to compile and build.

4. Compile and build modules

Run the following commands from the command line to compile and build the Cython module:

python setup.py build_ext --inplace

The above command will compile and build the Cython module and generate a binary file named encrypt.so in the current directory.

5. Encrypted Python code

Now we can use the encrypted Cython module with Python code. Create a file called main.py and write the following code:

import encrypt

text = "Hello, World!"
key=3

encrypted_text = encrypt.encrypt(text, key)
print("Encrypted text:", encrypted_text)

The above code imports the encrypted Cython module and uses the encryption function to encrypt the text.

6. Run the code

Run the following command on the command line to run Python code:

python main.py

Summary

Through the above steps, we successfully encrypted Python code using Cython. Since Cython modules are compiled binaries, they are difficult to decompile and modify, thus protecting our Python code.

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