Answered: Encrypt the first 4 letters of your…

Encrypt the first 4 letters of your last name as a block of data to be encrypted. (Let A=1, B=2, C=3,...Z=26). Decrypt the encrypted number to demonstrate that your system works. ABWG

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter8: Data And Network Communication Technology

Section: Chapter Questions

Problem 41VE

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Encrypt the message 001100001010 using Simplified DES (as defined in the book in section 4.2) and key 111000101. [Hint: After one round, the output is 001010010011.] If you do this by hand, it is sufficient to only do 3 rounds instead of 8 rounds. If you write a program, you should carry out the full implementation. Please provide your code.
Modify the codes with the same problem. 1.) decrypt code = input("Enter the coded text: ") distance = input("Enter the distance value: ") plainText = '' for ch in code: ordValue = ord(ch) cipherValue = ordValue - distance if cipherValue < ord('a'): cipherValue = ord('z') - (distance) - \ (ordValue - ord('a') - 1) plainText += chr(cipherValue) print(plainText) 2.) Encrypt plainText = input("Enter a one-word, lowercase message: ") distance = int(input("Enter the distance value: ")) code = "" for ch in plainText: ordValue = ord(ch) cipherValue = ordValue + distance if cipherValue > ord('z'): cipherValue = ord('a') + distance - \ (ord('z') - ordValue + 1) code += chr(cipherValue) print(code)
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Problem 1.Write computer programs for the Substitution Cipher based on Z29 which is corresponding to 26 alphabetic characters (0 - 25), space (26), and “, ” (27) “.”(28).The key is a random permutation π on Z29. Write down encryption and decryptionprograms. For the encryption, the plaintext and the key need to be input. To inputthe key, use the permutation of 0, 1, . . . , 28. The plaintext should be input as Englishletters. The out put will be the ciphertext which is also English letters. Select aparagraph of text which contains more than 25 words (I don’t think any two peoplewill choose a same paragraph if they choose independently) and encrypt it using yourencryption algorithm. Then use your decryption program to check the correctness.You can use Java. Record your plaintext, ciphertext and the key π in your answer sheet.
6. In a Rivest, Shamir and Adleman (RSA) cryptosystem, a particular user uses two prime numbers P and Q to generate the public key and the private key. If P is 23 and Q is 29, using RSA algorithm, find the following: e) public key f) private key g) Encrypted data (Assume the original message, M=7) h) Decrypted data
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Ciphers use many bitwise operations for cryptography. Write an ARM assembly program to use ciphers. See the steps below to implement the cipher. In this program you will implement a Symmetric Encryption. a) Assign a variable name “Choice” with value 0 or 1 to show the choice for encryption or decryption. 0 for encrypt and 1 for decrypt. . b) If we assign 0 to the variable choice the program will do encryption and if its 1 the program will do decryption. c) For encryption design a key value, for that assign your last nonzero number of your number in a variable called “Key” Example: if your number is 5012345 Assign 5 to the variable Key and use it as the Key for encryption. d) For choice 0 store the Cipher in a variable called “C”, for choice 1 store the Plain text in a variable called “P” (use symmetric Key cryptography and implement that for encryption and decryption). e) Test the encrypt program using the first letter of your name in capital case and to test decryption use the…
***Please use the 16-bit input of F5C6 and NOT the 16-bit F0F0. I've been trying to figure this out for awhile and all explanations have used F0F0, not F5C6***Consider a simple system with 8-bit block size. Assume the encryption (and decryption) to be a simple XOR of the key with the input. In other words, to encrypt x with k we simply perform x⊕k giving y. Similarly, to decrypt y, we perform y⊕k giving x. You are given the following 16-bit input “F5C6” in hexadecimal. You are provided IV as “8C” in hexadecimal. The key to be used (where appropriate) is “49” in hexadecimal. Compute the encrypted output with the following methods. Express your final answer, for each of them, as 4 hexadecimal characters so it is easy to read. A. Using ECB B. Using CBC C. Using OFB D. Using CFB
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In cryptography, a Caesar cipher is a very simple encryption techniques in which each letter in the plain text is replaced by a letter some fixed number of positions down the alphabet. For example, with a shift of 3, A would be replaced by D, B would become E, and so on. The method is named after Julius Caesar, who used it to communicate with his generals. ROT-13 (“rotate by 13 places”) is a widely used example of a Caesar cipher where the shift is 13. In Python, the key for ROT-13 may be represented by means of the following dictionary: key = {‘a’:’n’, ‘b’:’o’, ‘c’:’p’, ‘d’:’q’, ‘e’:’r’, ‘f’:’s’, ‘g’:’t’, ‘h’:’u’,‘i’:’v’, ‘j’:’w’, ‘k’:’x’, ‘l’:’y’, ‘m’:’z’, ‘n’:’a’, ‘o’:’b’, ‘p’:’c’,‘q’:’d’, ‘r’:’e’, ‘s’:’f’, ‘t’:’g’, ‘u’:’h’, ‘v’:’i’, ‘w’:’j’, ‘x’:’k’,‘y’:’l’, ‘z’:’m’, ‘A’:’N’, ‘B’:’O’, ‘C’:’P’, ‘D’:’Q’, ‘E’:’R’, ‘F’:’S’,‘G’:’T’, ‘H’:’U’, ‘I’:’V’, ‘J’:’W’, ‘K’:’X’, ‘L’:’Y’, ‘M’:’Z’, ‘N’:’A’,‘O’:’B’, ‘P’:’C’, ‘Q’:’D’, ‘R’:’E’, ‘S’:’F’, ‘T’:’G’, ‘U’:’H’, ‘V’:’I’,‘W’:’J’, ‘X’:’K’,…