DESpython实现代码

DES（Data Encryption Standard）是一种对称加密算法，用于数据的加密和解密。下面是一个简单的Python实现代码示例：

from Crypto.Cipher import DES
from Crypto.Util.Padding import pad, unpad

def des_encrypt(key, plaintext):
    cipher = DES.new(key, DES.MODE_ECB)
    padded_plaintext = pad(plaintext.encode(), DES.block_size)
    ciphertext = cipher.encrypt(padded_plaintext)
    return ciphertext.hex()

def des_decrypt(key, ciphertext):
    cipher = DES.new(key, DES.MODE_ECB)
    decrypted_data = cipher.decrypt(bytes.fromhex(ciphertext))
    plaintext = unpad(decrypted_data, DES.block_size).decode()
    return plaintext

# 示例使用
key = b'abcdefgh'
plaintext = 'Hello, DES!'
ciphertext = des_encrypt(key, plaintext)
decrypted_text = des_decrypt(key, ciphertext)

print("Plaintext:", plaintext)
print("Ciphertext:", ciphertext)
print("Decrypted text:", decrypted_text)

请注意，上述代码使用了`pycryptodome`库来实现DES算法。在运行代码之前，需要先安装`pycryptodome`库，可以使用以下命令进行安装：

pip install pycryptodome