Various encrypted technologies implemented by Python PyCrypto Library

Python is a powerful programming language that provides many libraries that implement various encrypted technologies.Among them, the PyCrypto library is one of the most popular cryptography libraries in Python.This article will introduce a variety of encryption technologies implemented by the Python PyCrypto library, and if necessary, it will explain the complete programming code and related configuration. The PyCrypto library is a cryptographic tool set used by Python, which provides various encryption and unbuttoning algorithms, such as symmetrical encryption, asymmetric encryption, digital signature, hash algorithm, etc.The following will introduce some common encryption technologies implemented by the PyCrypto library. 1. Symmetric encryption algorithm: -AES (Advanced Encryption Standard): This is a symmetrical encryption algorithm that uses the same keys to encrypt and decrypt.You can use the AES module in the PyCrypto library for implementation.The following is an example code that uses the AES algorithm to encrypt and decrypt data: python from Crypto.Cipher import AES key = b'sixteen byte key' cipher = AES.new(key, AES.MODE_ECB) plaintext = b'text to encrypt' ciphertext = cipher.encrypt(plaintext) decrypted = cipher.decrypt(ciphertext) print("Ciphertext:", ciphertext) print("Decrypted:", decrypted) 2. Asymmetric plus encryption algorithm: -RSA: This is a kind of asymmetric plus algorithm that can be used for encryption and decryption data, using public key encryption, and using private key decryption.The RSA module in the PyCrypto library can be implemented.The following is an example code that uses the RSA algorithm to generate key pairs, encryption and decryption data: python from Crypto.PublicKey import RSA from Crypto.Cipher import PKCS1_v1_5 # Generate key pair key_pair = RSA.generate(2048) # Get the public key and private key public_key = key_pair.publickey() private_key = key_pair.export_key() # Create encryption and decryptors cipher = PKCS1_v1_5.new(public_key) decryptor = PKCS1_v1_5.new(key_pair) plaintext = b'text to encrypt' ciphertext = cipher.encrypt(plaintext) decrypted = decryptor.decrypt(ciphertext, None) print("Ciphertext:", ciphertext) print("Decrypted:", decrypted) 3. Digital signature algorithm: -SHA256: This is a commonly used hash algorithm that can be used to generate data unique indications and is used for digital signatures.You can use the SHA256 module in the PyCrypto library for implementation.The following is a sample code for hash and verifying digital signatures of data: python from Crypto.Signature import DSS from Crypto.Hash import SHA256 from Crypto.PublicKey import DSA # Generate DSA key pair key_pair = DSA.generate(2048) # Get the public key and private key public_key = key_pair.publickey() private_key = key_pair.export_key() # 象 hash_obj = SHA256.new(b'text to sign') # 和 signer = DSS.new(private_key, 'fips-186-3') verifier = DSS.new(public_key, 'fips-186-3') # Signature and verification signature = signer.sign(hash_obj) verified = verifier.verify(hash_obj, signature) print("Signature:", signature) print("Verified:", verified) The above is a brief introduction to common encryption technologies implemented in PyCrypto libraries.By using the PyCrypto library, developers can easily implement various cryptography -related operations in Python.The above example code can be used as a starting point to help you start using the PyCrypto library for encryption and decryption.