Introduction to Python PyCrypto Library Introduction and Using Tutorial

Introduction and use tutorial of Python PyCrypto library Overview: Python is a powerful programming language that is often widely used in the fields of network communication and data encryption.PyCrypto is a Python library that provides the implementation of many encryption algorithms and protocols, allowing developers to easily protect sensitive data.This article will introduce the basic concepts, installation processes and several commonly used usage examples of the PyCrypto library. Install PyCrypto library: pip install pycryptodome Basic usage of PyCrypto library: 1. Import the required module: python from Crypto.Cipher import AES from Crypto.Random import get_random_bytes from Crypto.Protocol.KDF import PBKDF2 python def encrypt(data, password): # Generate a random 16 -byte (128 -bit) key key = get_random_bytes(16) salt = get_random_bytes(16) derived_key = PBKDF2(password, salt, 32, count=1000) # Create AES encryption objects, use CBC mode and randomly generate initialization vector cipher = AES.new(derived_key, AES.MODE_CBC, get_random_bytes(16)) # And return the encrypted data and initialization vector encrypted_data = cipher.encrypt(data) return encrypted_data, cipher.iv The above code uses the input data data to encrypt the AES algorithm as the key as the key, and returns the encrypted data and initialization vector. 3. Use AES encryption algorithm to decompose data: python def decrypt(encrypted_data, password, iv): # Use the PBKDF2 function to assign a 32 -byte (256 -bit) key salt = get_random_bytes(16) derived_key = PBKDF2(password, salt, 32, count=1000) # Create AES decryption objects, use CBC mode and specified initialization vector cipher = AES.new(derived_key, AES.MODE_CBC, iv) # Decry by the data and return the decrypted data decrypted_data = cipher.decrypt(encrypted_data) return decrypted_data The above code uses the AES algorithm to decrypt the input enCrypted_data data with Password and return the decrypted data. 4. Test code: python # 要 要 要 要 要 data = b"Hello, World!" # password password = b"mysecretpassword" # 加 加 加 encrypted_data, iv = encrypt(data, password) print("Encrypted Data:", encrypted_data) # 解 解 解 decrypted_data = decrypt(encrypted_data, password, iv) print("Decrypted Data:", decrypted_data) Run the above code, the data before the output, the encrypted data, and the decrypted data. Summarize: This article introduces the basic concepts, installation processes, and several common usage examples of the Python PyCrypto library.The PyCrypto library provides developers with powerful encryption tools, making data protection easier.By using the PyCrypto library reasonably, we can achieve higher -level data encryption and protection in the Python project.