Encryption/Decryption using RSA: Use p = 17, q = 11, and n = p*q = 17 × 11 = 187. φ(n) = (p - 1)(q - 1) = 16 × 10 = 160 PU = {7, 187} is the public key PR = {23, 187} is the private key Encrypt the plaintext message 80. What is the ciphertext message? Question 10 options: 80 90 85 75

Alice sets up an RSA public/private key, but instead of using two primes, she chooses three primes p, q, and r and she uses n=pqr as her RSA-style modulus. She chooses an encryption exponent e and calculates a decryption exponent d. Encryption and Decryption are defined: C ≡ me mod n and m ≡ Cd mod n where C is the ciphertext corresponding to the message m.  Decryption: de ≡ 1 mod φ(n) | Let p = 5, q = 7, r = 3, e = 11, and the decryption exponent d = -13. n = 105 & φ(n) = 48 Q: Alice upgrades to three primes that are each 200 digits long. How many digits does n have?

Question # 3 Assume that Dominique and Pricilla agreed to use an auto key cipher with initial keyvalue k1 = 11. Now Dominique wants to send Pricilla the following message“THE CLASS IS CANCELLED”. Encrypt the message before transmitting it over the Internet   Remember: i need a Mathematics solution not computer program You must show all the steps of your work

Computer Science Information Security Decode simple ciphering puzzles Solve the followings:   (HINT: This code uses base64 and the Caesar cipher)   UGRhIGx3b29za256IGJrbiBwZGEgeWR3aGhhamNhIGx3Y2EgZW86IHludWxwaw== Decode the following : Vigenere Code – Key Word Ym pyi kqw bbgy ckrbwkqutk xf cbiymswbt as r uqcnpv eijzi kjii dlzep xz xyg xgvhleb dm wvxmghp, rpl ioi dcrdymka wu vyi ewcavfxmgzmvu kdti wtwb alrv. Upyglu Ijyickch   Decode the following substitution cipher   S   W M B X   M B Q   X S Q E   X E H Q   X T H I B M D    X B R J G   X H R   S S S X S J J   L T   C B K A E Q,   L K Q   X B R J G   X H R   S O   X S J J   L T C B K A E Q   X S Q E   D Q S Y W D   H M G   D Q B M T D.

how to do this; Given an RSA public and private key of (note that not all of the private key is given):N = 3065977e = 425d = 713237 Decrypt the following message that has been encrypted using the public key above: 1559791

q5-   The Atbash cipher is a type of monoalphabetic cipher formed by taking the alphabet and mapping it to its reverse, so that the first letter becomes the last letter, the second letter becomes the second to last letter, and so on. For example: A becomes Z and Z becomes A, B becomes Y and Y becomes B, and so on. Numeric digits and special symbols will remain the same. What does XHV2HRZ mean?

Following the example, please break this cipher:   c=6642328489179330732282037747645 n=17058317327334907783258193953123 Please use screenshots to demonstrate the intermediate steps and results.   [screenshot]

Alice and Bod have decided to use a symmetric encryption algorithm. They have some assumptions about their messages:- Messages only contain capital letters (i.e. A to Z)- The length of their shared key must be greater than or equal to the length of the plaintext- They assign each letter a number as follows: (A,0), (B,1), (C,2), (D,3),…, (Z,25)Their algorithm combines the key and the message using modular addition. The numerical values of corresponding message and key letters are added together, modulo 26. For example, if the plain text is “HELLO” and the key is “SECRET” then the encrypted message is calculated as following:Since the length of the plaintext is 5, we just need the first 5 letters of the key (i.e. “SECRE”), then for each letter, we should add corresponding letters in both the plaintext and the key modulo 26.Plaintext: H (7) E (4) L (11) L (11) O (14)Key: S (18) E (4) C (2) R (17) E(4)Cipher: Z (25) I (8) N(13) C(2) S (18) Write a program in Python, C/C++ or JavaScript to…