方式1：有时候我们手中文件的内容十分的重要、十分地机密，我们可以选择对此进行加密，代码如下:
from cryptography.fernet import Fernet
def encrypt(filename, key):
fernet = Fernet(key)
with open(filename, 'rb') as file:
original = file.read()
encrypted = fernet.encrypt(original)
with open(filename, 'wb') as enc_file:
enc_file.write(encrypted)
key = Fernet.generate_key()
filename = "file.txt"
encrypt(filename, key)
然后对文件内容进行加密，当然这个密钥后面在对文件进行解密的时候会派上用场，因此密钥一定要保存完好，解密的代码如下
def decrypt(filename, key):
fernet = Fernet(key)
with open(filename, 'rb') as enc_file:
encrypted = enc_file.read()
decrypted = fernet.decrypt(encrypted)
with open(filename, 'wb') as dec_file:
dec_file.write(decrypted)
decrypt(filename, key)
上面的脚本，其中的密钥是一个随机生成的随机数，当然密钥也可以是我们自己指定的，代码如下
import pyAesCrypt
def Encryption(input_file_path, output_file_path, key):
pyAesCrypt.encryptFile(input_file_path, output_file_path, key)
print("File has been decrypted")
def Decryption(input_file_path, output_file_path, key):
pyAesCrypt.decryptFile(input_file_path, output_file_path, key)
print("File has been decrypted")
方式2：使用RSA加密算法实现数据的加密解密：
import os
import rsa
def encrypt_file(file_path, public_key_file):
"""使用RSA算法加密文件
参数：
file_path: 需要加密的文件路径
public_key_file: 公钥文件路径
返回值：
无
"""
# 读取文件内容
with open(file_path, "rb") as file:
file_content = file.read()
# 读取公钥
with open(public_key_file, "rb") as key_file:
public_key = rsa.PublicKey.load_pkcs1(key_file.read())
# 加密文件内容
encrypted_content = rsa.encrypt(file_content, public_key)
# 将加密后的内容写入文件
with open(file_path, "wb") as file:
file.write(encrypted_content)
def decrypt_file(file_path, private_key_file, password):
"""使用RSA算法解密文件
参数：
file_path: 需要解密的文件路径
private_key_file: 私钥文件路径
password: 私钥文件密码
返回值：
无
"""
# 读取文件内容
with open(file_path, "rb") as file:
encrypted_content = file.read()
# 读取私钥
with open(private_key_file, "rb") as key_file:
private_key = rsa.PrivateKey.load_pkcs1(key_file.read(), password)
# 解密文件内容
file_content = rsa.decrypt(encrypted_content, private_key)
# 将解密后的内容写入文件
with open(file_path, "wb") as file:
file.write(file_content)
