Computers and Technology
Computers and Technology, 07.08.2019 01:30, jcastronakaya

Encrypt the plaintext jupiter has many moons using the adfgx cipher with keyword star and a column permutation corresponding to the number 9532048617. what other plaintexts (whether or not they make sense) would have the same encryption using this same exact cipher?

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Computers and Technology, 29.10.2019 02:31, cjjudecjude5675
Use the instructor provided xor code to implement a scheme that allows you to encrypt and decrypt some data using symmetric encryption principles. -you can implement any scheme that you want. either one of the schemes discussed in the class or a new one that you designed on your own. -the key aspect is that you should generate several blocks from the input and you should do several rounds of encoding. -implement the python code and show your results. here is the provided code: ## xor script from os import urandom def genkey(length): return bytearray(urandom(lenght)) def encrypt(plaintext, key): return bytearray([ ord(plaintext[i]) ^ key[i] for i in range(len( def main(): mymessage = "this is the plain text" key = genkey cipher = encrypt(mymessage, key) print str(cipher) decrypted_message = decrypt(cipher, key) print decrypted_message if decrypted (encrypt(mymessage, key) , key ) == mymessage: print "it works" else: print "somthing failed"
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Computers and Technology, 29.10.2019 22:31, maddietomlinson113
Write a program vigenere.cpp. it should contain a function encryptvigenere implementing this cipher: string encryptvigenere(string plaintext, string keyword); you may assume that the keyword contains only lowercase alphabetic characters a - z. the main should implement a testing interface similar to the one in task b, the user enters the plaintext and the keyword, and the program reports the ci
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