2. Use the rail fence cipher to encrypt the statement "meet me after the toga party" 3. Using mathematical means and a key  "OUTSIDE", find the cipher text using vigenere cipher given the plaintext to be "THESUNISSHINING". The definition for vigenere cipher is given below: P = Z26 C = Z26 K = Z26 e((x1, x2, …., xn)) = ((X1+K1) mod 26, (X2+K2) mod 26, … , (Xn+Kn) mod 26)

Q: Q4: Based on Hill cipher algorithm, if the decryption key is -2 22 -5 17 -11 10 1 -12 In the case…

A: Here i explain about hill cipher encryption:…

Q: Explain how a monoalphabetic substitution cipher works. Illustrate your explana- tion by using the…

A: In questions with many questions we must answer the first one.

Q: Q: Encrypt the plaintext “CYBER INTELLIGENCE" by using the following ciphers. [f] Vigenere Cipher…

A: TASK: To encrypt the following text: "CYBER INTELLIGENCE" using: 1. Vigenere cipher 2. Playfair…

Q: Let p = 37 and q = 31 in the RSA set up. A. What are all the valid exponents in this case? Pick a…

A: To set up RSA encryption with p=37 and q=31, we first calculate n=pq=1147 and…

Q: Find the decryption key for the affine cipher with n=26, a=5 and b=8. Encrypt the message with the…

A: The Answer is

Q: Suppose your RSA public key is PK: {n, e} = {13861, 37}. Your friend sends you a ciphertext C =…

A: a) n=13861(given)e=37n=p*qn=167*83 b) e=37(given) RSA uses the Euler φ function of n to calculate…

Q: a. Mention the drawback of Mono alphabetic cipher. o. Which Cipher is used to resolve the issue with…

A: The major impediment is that by substituting more than one character of ciphertext for each…

Q: Q3. Given the design of Feistel cipher of DES encryption, assume that the function simply ORs Right…

A:

Q: Use the affine cipher to decrypt the following cipher-text EMOC with the key pair (K1, K2) = (6, 4)…

A: An example of a monoalphabetic substitution cipher is the Affine cipher, which maps each letter of…

Q: 5. Using a Shift Cipher, the plaintext ’EULER’ gives ’LBSLY’. What is the value of k?

A: Each letter in the plaintext is moved a specific number of positions down the alphabet in a shift…

Q: Use the Vigenère cipher to DECRYPT the following ciphertext: “OGTJQPPB” knowing that the keyword…

A: The Answer is

Q: Decrypt the message MAXLJGTEAX which was encrypted using the affine cipher: f(p) (5p+6) mod 26 =…

A: The Answer is

Q: Suppose your RSA public key is PK: {n, e} = {13861, 37}. Your friend sends you a ciphertext C =…

A: a) n=13861(given)e=37n=p*qn=167*83 b) e=37(given) RSA uses the Euler φ function of n to calculate…

Q: . In the RSA system with p = 101, q = 103, and k = 1249, determine the public key (a, n), and…

A: Solution: Introduction to RSA :

Q: Use the Vigenère cipher with the keyword "personal" to encrypt the following sentence: "approve the…

A: The Vigenère cipher is a classical method of encrypting text, belonging to the family of poly…

Q: Messages are to be encoded using the RSA method, and the primes chosen are p = 13 and q = 23, so…

A: Given, p = 13 q = 23 n = p*q = 299 Φ(n) = (p-1)*(q-1) = (12*22) = 264 e = 13

Q: Alice and Bob are using the EIGamal cipher with the parameters p 97 and a = 5. Alice makes the…

A: ElGamal cryptosystem is the public-key cryptosystem. The generation of Crypto Key in ElGamal is as…

Q: Suppose that the encryption function  mod 26,  and , encrypt the letter “F” by “A”. Use the…

A: Given, "F" is encrypted as "A". So, (F-5)mod 26 = A F G H I J K L M N O P Q R S T U V W X Y Z A B…

Q: I know how the Playfair cipher works. I would like to know how to find the keyword of the Playfair…

A:

Q: You are given the cipher text: LFKVKQRU produced with a Hill digraphic cipher. You know that the…

A: Given chipher text LFKVKQRU All 2x2 matrix with values between 0 and 9 have been computed, only best…

Q: The following ciphertext is encrypted using a monoalphabetic substitution cipher. Use the frequency…

A: To decrypt a monoalphabetic substitution cipher using frequency analysis, we need to identify the…

Q: Find the ciphertext using DES if the shared key is "SECURITY" and round 15's output is "IT? 7b/"?

A: Public Encryption Key and Shared Key To safeguard communications delivered between strangers, SKIP…

Q: Q4: Based on Hill cipher algorithm, if the decryption key is -2 5 -19 16 -14 11 7 -17 In the case…

A: Solution :: Let's see first what is hill cipher algorithm ?   the Hill code/puzzle is a lie…

Q: Find the decryption key for the affine cipher with n=26, a=5 and b=8. Encrypt the message with the…

A: Required:   Find the decryption key for the affine cipher with n=26, a=5 and b=8. Encrypt the…

Q: a. Mention the drawback of Mono alphabetic cipher. b. Which Cipher is used to resolve the issue with…

A: Drawback of Mono Alphabetic Cipher:   A mono-alphabetic substitution cipher provides a very (too)…

Q: 6. (a) A message is encrypted with shift cipher twice: once with the key H, and again with the key…

A: A cipher can be defined in such a way that it is a method of transforming information, generally…

Q: Practice using multiplicative ciphers to encode and decode a message:   1. Find quote that you…

A: Ans:) Multiplicative ciphers are used to encrypt and decrypt the messages by using the alphabets and…

Q: Determine the decoding function and find the plaintext message.

A: Follow the steps to solve the problem. The solution image is shared in step 2. Step1: The position…

Q: Suppose that an Affine cipher E(x) = (ax + b) mod 26 enciphers h as X and q as Y. Find the keys.

A: The affine cipher which refers as the one it is a type of monoalphabetic substitution cipher where…

Q: The Ciphertext below was encryted using a shift cipher with C(x) = (P(x) + 10)( mod 26). Decrypt the…

A: We can associate each character with a position such as character A belongs to position 0, Character…

Q: You intercept the ciphertext ’ JVCPK’. Knowing that the ciphertext was obtained using a Shift…

A: Ciphertext refers to the encrypted form of a message or data that has been transformed using an…

Q: Draw the block diagram of a typical expert system and explain the working of each part in detail.

A: To draw the block diagram of an expert system.

Q: Find the ciphertext using DES if the shared key is "SECURITY" and the output of round 15 is "IT?…

A: INtroduction Shared Key and Public Encryption KeySKIP uses a combination of cryptography shared…

Q: Suppose your RSA public key is PK: {n, e} = {13861, 37}. Your friend sends you a ciphertext C =…

A: a) n=13861(given)e=37n=p*qn=167*83 b) e=37(given) RSA uses the Euler φ function of n to calculate…

Q: Encrypt this Rail Fence/Caesar Cipher. Imagine that the plaintext has already went through 1 round…

A: encrypted message:(5,12,3,7,9,6,4,14,1,13,10,8,15,2,11,16)  explanation:  Suppose your plaintext is…

Q: The following text has been encoded using the affine cipher with key "9x+3". (That is, multiplying…

A: Below is the answer with calculation:

Q: In RSA: 1. Given n = 221 and e = 5, find d.

A: As per our guidelines we are supposed to answer only one question.Kindly repost other questions as a…

Q: Q) Encrypt the message “ MEET ME IN NET LAB " using Ceaser Cipher method and Key = 7. Verify the…

A: It is also called shift cipher. In this each letter in the plain text is replaced by a letter…

Q: The ciphertext below is known to have been encrypted using a Vigenère cipher. (a) Explain how a…

A: Solution:- Given Ciphertext:- JLGEQZYX JLGZFCSJ PYXSGMUR BYUWJLGF BYURBDCE NGYVZQIR EZZEQZYX…

Q: We want to encrypt the plaintext SECURITY using the RSA asymmetric cryptography. The Public key is…

A: Security = 8 p =5, q= 7 n=35. e =5   c = 85 mod 35   c = 8

Q: Perform the Encryption and then the Decryption for the Hill Cipher where the Plain text: "POH" and…

A: Check next step for  explanation

Q: Mention the drawback of Mono alphabetic cipher.

A: Answer 3 a) A disadvantage of the general monoalphabetic cipher is that both sender and receiver…