解说

要使⽤Python进⾏⽂件的加密和解密，可以使⽤第三⽅加密库，如cryptography或pycryptodome。
⼀个基本的⽰例，演⽰如何使⽤cryptography库对⽂件进⾏加密和解密：

1. 安装cryptography库：

   pip install cryptography
   

   

2. ⽂件加密： Encryption.py

   from cryptography.fernet import Fernet 
   
   # ⽣成加密密钥 
   key = Fernet.generate_key() 
   cipher_suite = Fernet(key) 
   
   # 读取要加密的⽂件 
   with open('plain_file.txt', 'rb') as file: 
   	plain_text = file.read()
   
   # 加密⽂件内容 
   cipher_text = cipher_suite.encrypt(plain_text) 
   
   # 将加密后的内容写⼊⽂件 
   with open('encrypted_file.txt', 'wb') as file: 
   	file.write(cipher_text) 
   
   # 保存密钥⽤于解密 
   with open('encryption_key.key', 'wb') as key_file: 
   	key_file.write(key)
   

3. ⽂件解密： Decrypt.py

   from cryptography.fernet import Fernet 
   
   # 从⽂件中加载密钥 
   with open('encryption_key.key', 'rb') as key_file: 
   	key = key_file.read() 
   
   cipher_suite = Fernet(key) 
   
   # 读取要解密的⽂件 
   with open('encrypted_file.txt', 'rb') as file: 
   	cipher_text = file.read() 
   
   # 解密⽂件内容 
   plain_text = cipher_suite.decrypt(cipher_text) 
   
   # 将解密后的内容写⼊⽂件 
   with open('decrypted_file.txt', 'wb') as file: 
   	file.write(plain_text)
   

 创建文件：plain_file.txt

  加密：py.exe  Encryption.py

  解密：py.exe  Decrypt.py