Question # 4: Use the multiplicative method to decrypt the following ciphertext. MADWU Key = 5 You must show all the steps of your work WRITE A mathematical solution NOT A COMPUTER PROGRAM
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Question # 4: Use the multiplicative method to decrypt the following ciphertext.
MADWU Key = 5
You must show all the steps of your work
WRITE A mathematical solution NOT A COMPUTER PROGRAM
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- solution in javascriptIntroductory: The Caesar Cipher technique is one of the earliest and simplest methods of encryption techniques. It is simply a type of substitution cipher, i.e., each letter of a given text is replaced by a letter some fixed number of positions down the alphabet. For example, with a shift of 1, A would be replaced by B, B would become C, and so on. The method is apparently named after Julius Caesar, who apparently used it to communicate with his officials. Thus, to cipher a given text we need an integer value, known as a shift which indicates the number of positions each letter of the text has been moved down. The encryption can be represented using modular arithmetic by first transforming the letters into numbers, according to the scheme, A = 0, B = 1 ,…, Z = 25. Encryption of a letter by a shift n can be described mathematically as. En(x) = (x+n) mod 26 (Encryption Phase with shift n) Write an algorithm and implement a program in C to read the data from a file (called…Question N Write a Python program to generate a pair of RSA keys (public and private) and demonstrate their usage for encryption and decryption. Hint: Use the cryptography library in Python to generate RSA key pairs and perform encryption/decryption operations Full explain this question and text typing work only We should answer our question within 2 hours takes more time then we will reduce Rating Dont ignore this line
- Eclipse Java: Write a program that reads a string (password) and a number. The maximum number of attempts (3). The program with stop asking data if the word ‘quit’ is provided in the password valueEncode the number using the given public key. Encode the number M = 14 using the public key n = 77 and e = 13. Assume you are encoding the number using the RSA cryptosystem. Note: You can use the Modular Exponentiation calculator to help with the calculation. a 46 (mod 77), encoded number = 46 47 (mod 77), encoded number = 47 48 (mod 77), encoded number = 48 d. 49 (mod 77), encoded number = 49Substitution ciphers are encryption/decryption algorithms that replace one letter or number with another. The first attested use of a substitution cipher in military affairs was by Julius Caesar, described by him in Gallic Wars (cf. Kahn pp83-84). In caesar cipher , you replace each letter by 3rd letter on. If it is out of bound (later than Z), then round to the head (letter A) and continue the shift. For example:meet me after the toga party PHHW PH DIWHU WKH WRJD SDUWB Please write a program in Java to implement the Caesar Cipher: a. Implement the encryption algorithm. Ask the user to input one all lower case normal sentence (called plaintext) using the nextLine method, and then output the encrypted text (called ciphertext). b. Implement the decryption algorithm. Ask the user to input one encrypted sentence (i.e. ciphertext) using the nextLine method, and then output the decrypted text (i.e. plaintext).
- Random J. Programmer discovers a much faster method of generating a 64-bits signature for a message using secret key technology. The idea is to simply encrypt the first 64 bits of the message, and use that as the signature. What’s wrong with this idea?Task3: Program an encryption tool that uses XOR operation to encrypt the message. (Note: the key should be numerical) Hint': you must encrypt all letters of the "plaintext" variable. Hint?: you have to iterate through all letters to encrypt them. Hints: you can use ord() method, to receive each character Unicode https://careerkarma.com/blog/python-ord/ "The text to be encrypted" plainTxt key = "432457" %3D Here's the output: [W@VJAG]VVPZPOL[CFPP plainTxt = "The text to be encrypted" key "theKey" %3D The key must be numbersLet p = 23, q = 47, g = 2, H(M) = 2. Let x= last two digits of roll no and k = middle digit of roll no and if middle digit is 0 take the value of k = 9.{ Hint roll no is: 045, then middle digit = 4 and last two digit= 45}. Compute the public key y. Generate signature (r, s) ROLL NO :009
- Elgamal public key cryptosystem (encryption): Start with the prime p = 17 and the primitive root g = 3. Alice sends Bob the public key A = 5. Bob wants to send the message m = 13 to Alice. Bob chooses the random element k = 2. Using the Elgamal public key cryptosystem, compute the pair of numbers (C₁, C₂) that Bob sends to Alice. Note: Do not work out how Alice computes the plaintext message m from the ciphertext (C₁, C₂).In JavaTwo methods may terminate operations and resolve impasses:
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