(1)加密(Encryption) 将明文变换为密文的过程。把可懂的语言变换成不可懂的语言。 (2)明文(Plaintext) 加密前的原始信息。 (3)解密(Decryption) 加密的逆过程,即由密文恢复出原明文的过程。把不可懂的语言变换成可懂的语言。 (4)密文(Ciphertext) 加密后的信息。 古典加密算法主要分为: 单表替代密码:Caesa...
# Save encrypted text and key to a file with open(filename, 'w') as file: file.write(f"Key: {key}\nEncrypted text: {text}") print(f"Text and key saved to {filename}") def encrypt_and_save(): # Take user input, encrypt, and save to a file user_input = "" while not use...
# Measure how long the encryption/decryption takes: startTime = time.time() if myMode == 'encrypt': translated = transpositionEncrypt.encryptMessage(myKey, content) elif myMode == 'decrypt': translated = transpositionDecrypt.decryptMessage(myKey, content) totalTime = round(time.time() - star...
# Measure how long the encryption/decryption takes: startTime = time.time() if myMode == 'encrypt': translated = transpositionEncrypt.encryptMessage(myKey, content) elif myMode == 'decrypt': translated = transpositionDecrypt.decryptMessage(myKey, content) ...
J6rp5r7Jzr66ntrM'# The encryption/decryption key:key =13# Whether the program encrypts or decrypts:mode ='decrypt'# Set to either 'encrypt' or 'decrypt'. 当您现在运行该程序时,输出如下所示: Thisismy secret message. 导入模块和设置变量...
#AES 256 encryption/decryption using pycryptodome libraryfrombase64importb64encode, b64decodeimporthashlibfromCryptodome.CipherimportAESimportosfromCryptodome.Randomimportget_random_bytesdefencrypt (plain_text, password) :#generate a random saltsalt =get_random_bytes(AES.block_size)#use the Scrypt KDF ...
We will use symmetric encryption, which means the same key we used to encrypt data is also usable for decryption. There are a lot of encryption algorithms out there. The library we gonna use is built on top of the AES algorithm.There are many encryption uses in the real world. In fact...
(ciphertext): # First, we need to do Kasiski examination to figure out what the # length of the ciphertext's encryption key is: allLikelyKeyLengths = kasiskiExamination(ciphertext) if not SILENT_MODE: keyLengthStr = '' for keyLength in allLikelyKeyLengths: keyLengthStr += '%s ' % (...
# The encryption/decryption key: key = 13 # Whether the program encrypts or decrypts: mode = 'decrypt' # Set to either 'encrypt' or 'decrypt'. 当您现在运行该程序时,输出如下所示: This is my secret message. 导入模块和设置变量
AES(Advanced Encryption Standard)是一种广泛使用的对称加密算法,适用于大量数据的加密,包括文件。在Python中,可以使用cryptography库对文件进行AES加密: from cryptography.fernet import Fernet from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes from cryptography.hazmat.backends import default_...